This electron transfer will obviously shift the ratio of the protons to electrons on the atoms involved and will thus affect the oxidation number of the atoms involved. physical reactions using all green materials. There are five reactions to do in this lab. Class Handouts. Reactions that release a lot of heat, such as the thermite reaction, can be explosive. • Cooking rice. • Write balanced equations for the reactions studied. This is a kid-friendly activity. Liver Enzyme Lab. You will be asked to make observations about the mixtures and conclude whether a chemical reaction has occurred or not. Some reactions need energy to start. Redox reactions as they are often called are simply reactions that involve the transfer of electrons from one chemical species to another. Use your observations above, information in the introduction, and reading to classify the above chemical reactions in the table below. Well Chemical #1 (4 drops) Chemical #2 (4 drops) Observations: Chemical Change (Y/N) A1 NaHCO 3 Sodium Bicarbonate HCl Hydrochloric Acid Bubbled and fizzed to the top. a lab experiment to test the rate of. Thousands of chemical reactions are occurring in the human body. The chemical provided was an Aqueous Ammonia solution of NH4OH. • To identify the products formed in chemical reactions and predict when a reaction will occur. Qualitative Analysis of the Group III Cations 6. Record your physical observations of each powder in your lab notebook. A color change. Precipitations Reactions. Lab #7 Mass Relationships in Chemical Reactions General Discussion In general, we say that a reaction will go to completion (be quantitative) if one of the reactants is completely consumed by the reaction. Rinse each test tube twice with 5 mL portions of tap water, and twice with 5 mL portions of distilled water. From this lab I learned how chemical reactions can occur among different substances and what results they produce. • Oxidation examples: rust or tarnishing. Data Table Physical Properties Element (Symbol) Appearance Malleability. In this lab, Alka-Seltzer (an antacid that prevents upset stomachs, acid indigestion and headaches), inspired me to create an experiment on it. • To perform and observe the results of a variety of chemical reactions. The chemical processes which govern combustion, cloud formation, and climate change are extremely complex. Typically the mole ratios of reactants and products can be found from a balanced chemical equation, however when the formulas of the products are unknown, experiments can be conducted to discover this ratio. For example, when we burn glucose, C 6 H 12 O 6, the products of the reaction are carbon dioxide and water:. For example, you should be able to answer the question “Does the release of a gas mean a physical change or a chemical change has occurred?”. The major clues which indicate a chemical reaction are: 1. To write balanced equations for the reactions studied. When the reaction stops, only a portion of the other reactant has been consumed, meaning that some is still unreacted. You will observe the four classes of chemical reactions--synthesis, decomposition, single and double replacement. The following properties may be useful: · All compounds containing Group IA and ammonium cations are soluble. Chemical Reaction #1. In a chemical reaction, substances (elements and/or compounds) called reactants are changed into other substances (compounds and/or elements) called products. Reactions of Aldehydes and Ketones Aldehydes and ketones both have, as their functional group, a carbon-oxygen double bond (carbonyl group). The thermodynamic factor is the difference in free energy released during a chemical reaction. Typically the mole ratios of reactants and products can be found from a balanced chemical equation, however when the formulas of the products are unknown, experiments can be conducted to discover this ratio. Chemists represent chemical reactions by chemical equations. EXPERIMENT 4 Chemical Reactions Involving Changes in States of Matter or Pieces of the Carbon Cycle INTRODUCTION There are 3 basic states of matter that we encounter in chemical reactions - solid, liquid and gas. First: classify the reaction as a main type: either synthesis, decomposition, combustion, single replacement OR double replacement. To identify the two unknown liquids from their experimental observations. The calculations provide a detailed view of the atomic and electronic reorganizations during the reaction, and highlight the key role of the distal residues to assist the reaction. the manner in which one or more of the chemical species is affected. Thousands of chemical reactions are occurring in the human body. (OR The objective of this lab is to observe the effect of temperature and concentration on the rate of a chemical reaction. Big thoughts coming at you: The rate of a chemical reaction is affected by the physical size of the reactants. What are three signs of a chemical change? 2. Some observations about the reactions that you performed in experiment 10-003c: Your text (Chapter 4) and lab manual (pp. observations. Students will be able to distinguish between. Usually, what happens is the production of hydrogen at the copper electrode and the zinc electrode acquires deposits of oxides that act as a barrier between the metal and the electrolyte. Observations of Chemical Changes Experiment 1 Chemistry 111 September 3,2014 Ashley Mattox Abstract: The purposes of this lab is to observe the reactions of some common chemicals contained in consumer products and observe the macroscopic changes these chemicals undergo. A few examples of such reactions will be used to develop a clear picture of this classification. Nevertheless the way in which the rate constant is affected by various changes in the nature of the complex ion is expected to give us information about the mechanism. The detection of these elements depends upon converting them to water-soluble ionic compounds and the application of specific tests. All of the aluminum-based approaches propose methods to circumvent the protective. Observations: Record your observations and the answers to all questions in the space provided. Chemical reactions are the result of a rearrangement of the molecular or ionic structure of a substance. Often times a chemical reaction is needed to alter the polarity of one of the components of the mixture. Explain that, in endothermic reactions, energy must be absorbed in order for a chemical reaction to occur. When the reaction stops, only a portion of the other reactant has been consumed, meaning that some is still unreacted. The final result for each reaction will be: A) proof the reaction occurred (the “before and after” observations) B) the ba lanced chemical equation for the reaction Pre-lab Questions 1. • Photosynthesis. their knowledge of life, by sorting reactions into groups and classifying them. Discard the contents of test tubes 1, 2, and 3 into your waste beaker. Demonstrations › Chemical Reactions II › 5. Chapter 3 Chemical Reactions 41 Chemical Equilibrium 7. The Liver: Helping Enzymes Help You! many chemical reactions occur. MATERIAL: 2 - 100 mL beakers distilled water stirring rod small scoopful of copper(II) chloride thermometer paper towel 10 cm x 10 cm square of aluminum foil mortar and pestle. It is a chemical change because a new substance, metallic silver, is formed; and its properties are different from that of silver halides. A mole ratio converts moles of one compound in a balanced chemical equation into moles of another compound. Don’t just follow directions “cook book” style, but make an effort to understand the chemical principles behind the procedures. Give an example, other than the ones listed in this experiment, of redox and metathesis reactions. This observation, however, furnishes no information as to the role played by the water and does not give any information about the molecularity of these reactions. I can balance chemical equations to fulfill the Law of Conservation of Mass I can interpret changes in matter and energy from complete chemical equations I can write chemical reactions by interpreting. In this lab, you will study the catalase found in liver cells. All chemical manufacturing is the result of chemical reactions, caused by particle collisions. Sosia gave you several items to choose from, and there are others. Often times a chemical reaction is needed to alter the polarity of one of the components of the mixture. The thermite reaction is a single-replacement reaction between iron (III) oxide and aluminum: 3Fe 3 0 2 + 4Al → 2Al 2 0 3 + 6Fe. Common observations of a chemical reaction are described in the introduction section. Independently of the mechanism, the reaction proceeds by two one-electron transfers rather than one two-electron transfer, as has long been the lore. Le Chatelier’s Principle: Le Chatelier’s Principle Mg(OH)2 Mg+2 + 2 OH-1 In a plate well, an aqueous solution of MgCl2, to which phenolphthalein is added, is treated with an aqueous solution of NaOH till the solution turns pink. Catalase Liver Enzyme Lab; SB1b Background: All organisms rely on enzymes to catalyze chemical reactions. The new product can then become a reactant in another chemical reaction. Also note that heat and light are released via the flame. Observing means using the senses: seeing, smelling, touching, hearing, and sometimes tasting. Students will develop their own models to describe phenomena. Chemical Reactions. They all occur under conditions far from chemical equilibrium and all involve autocatalysis, i. 1 Reaction of Metals with Hydrochloric Acid. Although there are untold millions of possible chemical reactions, most can be classified into a small number of general reaction types. A chemical reaction is taking place as evidenced by a gas being released and a temperature change. Observation and experiment are twin pillars of the scientific method. Predicting Products of Chemical Reactions 12. *Teacher observation *Note-booking *describe phase change in terms of the motion and arrangements of atoms and molecules. • Combustion. Once sensitization occurs, allergic reactions result from exposure to extremely low doses of the chemical. Content • Students will perform a scientific investigation in order to observe chemical reactions, predict how substances will react when mixed, determine evidence of a reaction, and draw conclusions about chemical reactions. To compare the chemical reactivity of an alkane, an alkene, and an aromatic compound. React magnesium (Mg) and 1. All chemical manufacturing is the result of chemical reactions, caused by particle collisions. 4) Write & balance the chemical equation for each reaction. The production of light and heat is evidence for a chemical reaction. Based on the observation of the optional demonstration, what type of gas do you predict is produced by the potato with hydrogen peroxide decomposition reaction? The chemical formula for hydrogen peroxide is H 2 O 2. Take proper safety precautions when working with heat, such as wearing gloves and using eye protection. 1 HCl + NaOH Initial HCl solution was clear and colorless and turned blue litmus paper pink. Reaction #J 1. middle school lab, high school lab, university lab, and classroom demonstration Applications, Topics, Purpose chemical formulas, chemical properties of gases, types of chemical reactions, precipitation reactions, characterization of gases Instructions Prepare a syringe full of CO2. Skip navigation Sign in. What were the products in this lab? 4. CHAPTER 10 Chemical Reactions • Data and Observations This section presents a suggested table or form for collecting your. Which of the reactants in Data Table 1 showed evidence of a chemical reaction with the aluminum foil? Use your observations to explain your answe List the metals found in each of the four reactants in Data Table 1. Nature of reactants REACTANTS OBSERVATIONS Large chalk piece + HCl Crushed chalk piece + HCl B. It is a chemical change because a new substance, metallic silver, is formed; and its properties are different from that of silver halides. BACKGROUND The chemical reactivity of hydrocarbons is. The majority of. To learn to distinguish between qualitative and quantitative observations. This lab replaces traditional reactions involving chemicals such as copper(II) chloride, 6M hydrochloric acid, potassium hydroxide, and copper sulfate. There are five reactions to do in this lab. Add about 2 g of iron filings to the solution. The products formed during the reaction are lead oxide and potassium nitrate. It would be EXTREMELY helpful for you to have your lab open on a separate window/tab - as this quiz asks about specifics of your lab data and observations as well as the concepts discussed in the lab introduction. If this makes any sense to you then you are clearly a genius. Many, however, can. The calculations provide a detailed view of the atomic and electronic reorganizations during the reaction, and highlight the key role of the distal residues to assist the reaction. Subjects: Oxidation/reduction, gas forming reaction, acid properties, net ionic equations, exothermic reactions. Extend Have students identify the two substances in baking powder that make it bubble when water is added. Demonstrations › Chemical Reactions II › 5. The chemical processes which govern combustion, cloud formation, and climate change are extremely complex. Engine (5) Process Vocabulary and (6) Chemical Equation Constructor. Temperature Warmed oxalic acid reaction times: 1. Do NOT heat small test tubes. Procedure: One team at each lab table will complete the even # experiments, while the other team completes the odd # experiments. In a table, summarize your observations for each of the reactions that you perform on the iron-. Though looking simple, this reaction is the basic principle involved in the manufacture of club soda, coca cola, Pepsi etc. EasyMax 102 Advanced Synthesis Workstation is ideal for chemical process optimization at volumes of 0. OBJECTIVES 1. Which of the reactants in Data Table 1 showed evidence of a chemical reaction with the aluminum foil? Use your observations to explain your answe List the metals found in each of the four reactants in Data Table 1. The substance could change form but if it wasn’t permanent and could be changed back into its original form then it would be a physical change. Example: When a candle burns, it gives off light and heat. Skip navigation Sign in. Heat of Fusion for Ice 19. When holding up the solution of AgNO3 and NH4OH to a light source for 5 minutes it was observed that no reactions took place despite the information contained in the lab manual. Law of conservation of mass states that the mass remains conserved during a chemical reaction. Background A chemical reactions is defined as any process in which one or more substances are converted into new substances with different. When the car undergoes a head-on collision, a series of three chemical reactions inside the gas generator produce gas (N 2 ) to fill the airbag and convert NaN 3 , which is highly toxic (The maximum concentration. As you proceed in this course, you will often observe similar types of reactions. Scribd is the world's largest social reading and publishing site. In this case, chemical reaction rates will be determined to a large extent by collisional properties at large intermolecular separations, and thus by how the two partners approach each other. Relate your submicroscopic observation with your macroscopic observations for one example of a reacting and one example of a non-reacting combination. This lab is designed to be done very early in the year. The reaction of ethanol with sodium metal (a base) produces sodium ethoxide and hydrogen gas. Materials Mossy zinc Copper wire Magnesium ribbon Copper II carbonate 6 M HCl 1 M CuSO 4. The method of continuous variations allows scientists to determine the mole ratio of two reactants in a chemical reaction. 6 Distinguish between heat and temperature. Liquid form. • To identify the products formed in chemical reactions and predict when a reaction will occur. What does exothermic and endothermic mean? 3. Don’t just follow directions “cook book” style, but make an effort to understand the chemical principles behind the procedures. Chemical reactions are involved in the making of food, paper, plastics, pharmaceuticals, fuel, soaps, and numerous other products that we enjoy using. Home / Physical Science / Labs, Demos & Science Stations / CHEMICAL BONDS AND EQUATIONS – Demos, Labs and Science Stations. Chemical and Physical Changes in Your Kitchen Annotation This lab helps students to understand the difference between chemical and physical changes. This reaction is identical to the reaction of sodium metal with water. To identify the two unknown liquids from their experimental observations. Tertiary alcohols give no visible reaction within 2 seconds, the solution remaining orange in color. The experiment is conducted by putting an aqueous reaction solution into oil and shaking the mixture vigorously. Gram staining is a differential staining technique that differentiates bacteria into two groups: gram-positives and gram-negatives. Now that we can recognize these actors ( compounds ), we turn to the roles they are inclined to play in the scientific drama staged by the multitude. In this lab, Alka-Seltzer (an antacid that prevents upset stomachs, acid indigestion and headaches), inspired me to create an experiment on it. as opposed to reaction rate. Do you think temperature has a greater impact on the rate of chemical weathering or mechanical weathering? Explain. of bottles and examining the mixture for evidence of chemical reaction. Classic Iodine Clock Reaction Standards: HS-PS1-6. There are many ramifications for this experiment. Some of the reaction types that occur in this experiment are listed. Was a gas other than the air created in this chemical reaction? How do you know? 2. The result is an emulsion consisting of thousands of droplets. The following properties may be useful: · All compounds containing Group IA and ammonium cations are soluble. 2 hours ago Reaction E0 Zn → 2e- + Zn2+ 0. Example: When a candle burns, it gives off light and heat. Students will develop their own models to describe phenomena. -HCO 3 +(aq) H (aq) + CO 3 2-(aq) (1) Calcium ion (Ca2+) from calcium chloride reacts with sodium bicarbonate to give insoluble calcium carbonate. Temperature increased from 22 °C to 27 °C within 1 minute when NaOH was added. Evidence of a chemical change might be a color change , a gas given off (it may smell) , the formation of a precipitate (a new solid), or an energy (temperature, light) change. (aq) + AgCl(s) 2. Most of the chemical reactions will either form a precipitate or evolve gas. Introduction and Purpose: There are millions of chemical reactions occurring around us every second of every day. 2 How do reactions oscillate? The problem of how oscillating chemical reactions occur has been examined theoretically to establish ways in which oscillations can happen. Record the pH, color, state of matter, and other evidences of chemical reactions 10. identify the products formed in these reactions. Observing means using the senses: seeing, smelling, touching, hearing, and sometimes tasting. chemical reactions. The goal of this second. The Chemistry of Lipids Experiment #8 Objective To observe the solubility of lipids in polar and nonpolar solvents and to compare saturated and unsaturated fats in their chemical reaction with bromine. The reaction is as follows: 2H 2 O 2----> 2H 2 O + O 2 Materials:. Demonstrations › Chemical Reactions II › 5. This equation describes the chemical reaction in general terms, but it may not describe the precise chemical changes that occur at the molecular or ionic levels. A galvanic cell or voltaic cell is a device in which a redox reaction, such as the one in equation (4), spontaneously occurs and produces an electric current. Reactions of hydrocarbons. A reaction system (A) determines the time course of conversion of reactants into products (B), that is controlled by the energy path (C) along the reaction pathways (D) of the reaction system. Why should you wash your hands after completeing the lab? 2. In addition, any barrierless chemical reactions will always take place when two reactants are sufficiently close together. Record observations 4. Students will have minimal lab experience. Stress refers to changes in concentration, pressure, volume, and temperature. The detection of these elements depends upon converting them to water-soluble ionic compounds and the application of specific tests. Lab Objectives • Careful observation and detailed description of chemical reactions in solution • Inferring from observation and from other information whether or not a reaction actually takes place • Writing the reactions that take place in the shorthand language of chemistry: chemical equations (molecular, complete ionic, and net ionic. In this video you will learn about five different types of chemical reactions that are: 1- Single. The data table show that when the concentration of HCl was 0. For every chemical change there is a change in energy. Reactants. Observing Chemical Reactions. Every time you cook or clean, it's chemistry in action. Five unlabeled bottles. This lab activity includes: *Lab procedures/student worksheet *Lab key *Teacher notes. It also dissolves in mercury to form a sodium amalgam. The lab manual called for the chemical NH3 which is Ammonia. List the observation (s) which justify that a chemical reaction has taken place. During any chemical reaction, heat can be either taken in from the environment or released out into it. Evidence of a chemical change might be a color change , a gas given off (it may smell) , the formation of a precipitate (a new solid), or an energy (temperature, light) change. Chemical Reactions of Copper and Percent Yield KEY Pre-lab (Review Questions) 1. From observations, you will identify the products of each reaction and determine the type of reaction that has taken place. Acids and Bases: Their Reactions, Conductivity, Base Indicators. MATERIAL: 2 - 100 mL beakers distilled water stirring rod small scoopful of copper(II) chloride thermometer paper towel 10 cm x 10 cm square of aluminum foil mortar and pestle. Formation of a Precipitate Precipitate: A solid that settles out of a solution Formation of a gas (Effervescence) 3. Employing only a tiny amount of material, the scientists have thus found a cost-efficient. For example in mild steel (which is greater than 99% iron) the metal corrodes according to the following:. The reaction of sodium and chlorine to form sodium chloride, and the burning of coal (carbon) to give carbon dioxide, are examples of combination reactions. Half-fill a small test tube with copper (II) sulfate solution. Qualitative Simulation Laboratory The qualitative simulation lab is designed to familiarize student with the chemical reaction between two reactants. Equipment:. Observations: Cobalt chloride hexahydrate is a rose colored solution, sodium hydroxide is a clear solution. Is it an endothermic reaction or an exothermic reaction? Part 2: 1. Part Two: Chemical Changes. Until 1889, there was no fixed way to physically measure the temperature dependence of the rate of a chemical reaction. ----- The reaction you will be studying in this part of the lab is given by the equation:. This reaction is considered as the simplest method to verify this law. Redox reactions as they are often called are simply reactions that involve the transfer of electrons from one chemical species to another. TYPES OF CHEMICAL REACTIONS PURPOSE: The purpose of this experiment is perform, balance and classify chemical reactions based on observations. In order for materials to burn, oxygen is needed. Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form. Here is the chemical reaction of the bunsen burner fuel with oxygen as it burns: CH 4 + 2 O 2 —> CO 2 + 2 H 2 O CH 4 is called methane and is the major component of natural gas. The chemical reaction kinetics of single nanocatalysts with different nanopore morphologies were quantitatively measured at the single-particle, single-molecule level with turn-over resolution. In the experiment, we learned. 955g of Cu was given initially; 5. That is a chemical reaction must take place. The data table show that when the concentration of HCl was 0. Not all reactions can be put into one of these categories. Conservation of Matter Lab The law of conservation of matter states that matter cannot be created or destroyed in an ordinary chemical reaction. I learned quickly, during a lab about reactions in aqueous solutions last semester that a color change can be a good indicator of a chemical reaction. Which one is it, and what two types can it be classified as?. This lab is designed to be done very early in the year. Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions is the scientific discipline involved with elements and. Many chemical reactions are found to proceed to an equilibrium at which a mixture of both reactant and products is present. By convention the metallic ion is always named first. In one, they can be classified either as oxidation-reduction or non-oxidation-reduction reactions. Exothermic reactions always involve oxygen, and they always generate heat. In addition, any barrierless chemical reactions will always take place when two reactants are sufficiently close together. This lab activity includes: *Lab procedures/student worksheet *Lab key *Teacher notes. Based on your observations of reactions between the metals and hydrochloric acid, where would hydrogen fit in your activity series? The Statue of Liberty is made of copper. What type of gas was produced in this lab? How. This lab is designed around developing observation skills. Observing Chemical Reactions Introduction: In this experiment you are going to mix two different chemicals together and observe what, if anything happens. Lab 8 Experiment 2: React metals with salts of other metals to cause a single replacement reaction b1) In the iron(II) sulfate solution, describe the particles you see through the mini-microscope. The precipitation reaction is one of them, which results in the formation of precipitate (insoluble product). Quantitative and Qualitative Observations of a Chemical Reaction Bude. If there is a chemical reaction, write the net ionic equation. Some observations about the reactions that you performed in experiment 10-003c: Your text (Chapter 4) and lab manual (pp. Example: The fireworks that brighten the sky each Fourth of July are based on the reaction between magnesium and oxygen to form magnesium oxide. Involved in researching ways to develop new and improved chemical manufacturing processes Observation of reaction from development stage to collect necessary engineering data Conduct Kilo lab batches, fine tuning of process and understand/monitor critical process parameters at lab scale. This equation may remind you of the chemical reaction of the burning of a candle. From the observations you gather during the lab, you must decide which types of observations indicate a physical change, which indicate a chemical change and which might indicate both. A chemical reaction is defined as the process, wherein a set of chemical substances react with each other, which leads to their conversion into other different forms. Chemical Reactions: Introduction to Reaction Types: Lab Report Name: _____ Partner(s): _____ Section Number: _____ Part A: Video Reactions: Record your observations of the video reactions chosen by your instructor. For most spontaneous chemical reactions, the energy released by the new bond formation is greater than that required to break the old bonds. Chemical Reaction #1. ----- The reaction you will be studying in this part of the lab is given by the equation:. Ultimately, you want to relate your findings to the Collision theory of chemical reactions. The test tubes hold more materials; the spot plate holds less, but the spot plate is a whole lot easier to wash. All of the aluminum-based approaches propose methods to circumvent the protective. Thousands of chemical reactions are occurring in the human body. One useful method classifies reactions into four major types. 6 Distinguish between heat and temperature. Chapter 5 Lesson 9 addresses. React magnesium (Mg) and 1. To become familiar with the observable signs of chemical reactions. Chemical reactions between certain types of soluble liquids can result in new properties, such as production of a different liquid and solid material called a precipitate. TYPES OF CHEMICAL REACTIONS PURPOSE: The purpose of this experiment is perform, balance and classify chemical reactions based on observations. to the solution in test tube 3. The reaction is: 2H 2 O 2 → 2H 2 O + O 2. A,B A,C B,C A,D B,D C,D A,E B,E C,E D,E Record the color of the initial solutions for unknowns A-E as either colorless or blue:. The observations prove that a lower concentration of HCl does decrease the rate of reaction, and that a higher reaction rate occurs when the concentration levels increase. Experiment 2: The 9 Bottles. Observing Chemical Reactions Name _____ Objectives: 1. Teacher Background. A chemical reaction is taking place as evidenced by a gas being released and a temperature change. Any physical or chemical condition that damages a protein will damage an enzyme as well. This preview has intentionally blurred sections. The reaction of sodium and chlorine to form sodium chloride, and the burning of coal (carbon) to give carbon dioxide, are examples of combination reactions. Type of Reaction single replacement Predict Products (write in words) magnesium chloride and hydrogen gas Equation (write in symbols) 2HCl(aq) + Mg(s) ( MgCl2(aq) + H2(g) Chemical Reaction #2. While it is true that there is a change of substance, what two things can you observe while this change is taking place?. In this lab you will investigate several variables to learn how they affect reaction rates. 2H2O2 2 H2O + O2 Students will love this experiment. 2 hours ago Reaction E0 Zn → 2e- + Zn2+ 0. Students will determine the relative activity of several metal elements and the identity of an unknown ionic compound based on its chemical properties. Record your observations (ONLY what you see, feel, hear, or smell). Although there are untold millions of possible chemical reactions, most can be classified into a small number of general reaction types. Electrochemistry: Galvanic Cells and the Nernst Equation Introduction. Vinegar contains acetic acid. Chemical Equations; Conservation of Mass; Description How do you know if a chemical equation is balanced? What can you change to balance an equation? Play a game to test your ideas! Sample Learning Goals Balance a chemical equation. Write a chemical equation for one of the reacting combinations. 11 demonstrate knowledge and understanding that Group 1 (I) metals react with water to produce hydrogen and a metal hydroxide, and give observations for the reactions; CCEA Chemistry. Introduction and Purpose: There are millions of chemical reactions occurring around us every second of every day. Students revisit the Pop Rockets activity from Lesson 3, in which mini paper rockets are powered by the chemical reaction of antacid-tablets and water in plastic film canisters. The experiment is conducted by putting an aqueous reaction solution into oil and shaking the mixture vigorously. +Acid-Base reactions: The H from an acid reacts with the OH- from a base to form water, while the remaining cation and anion form a salt. We've recently updated our site. Endothermic and exothermic reactions and processes are a common topic in chemistry class. PURPOSE: To observe a chemical reaction and record the evidence for any chemical changes observed. We know we created a gas because we could smell it. Simple ingredients for citrus chemical reactions: baking soda, lemons, limes, grapefruits, and oranges. In this lab we did a series of experiments to explore the chemical reaction: Fuel + O2 ( CO2 + H2O where the fuel is a candle. Many chemical reactions do not go to completion, but reach a state of equilibrium before the reactants are completely consumed. BACKGROUND The chemical reactivity of hydrocarbons is. Some errors in the chemistry lab result from an unclear definition or expectation of what the experiment is supposed to record. The most common property used to distinguish these hydrocarbons is based on their reaction with other compounds. Observing means using the senses: seeing, smelling, touching, hearing, and sometimes tasting. Conclusion From all the data we have and analysis above we would draw the conclusion below: - Temperature affects the rate of chemical reaction, the warmer the water is, the faster the reaction will be; the colder the water is, the slower the reaction would be. Most tests involve 'standard' chemical reactions and few tests are totally specific so observations should be viewed in context, i. Observe the flame as your teacher lights the Bunsen burner. You will learn common lab practices and lab techniques. EasyMax 102 Advanced Synthesis Workstation is ideal for chemical process optimization at volumes of 0. H 2 O + CO 2 <-----> H 2 CO 3. Sodium also reacts with most other elements and with many compounds. The observations prove that a lower concentration of HCl does decrease the rate of reaction, and that a higher reaction rate occurs when the concentration levels increase. Yes, I think the posts on the endothermic reactions are right on. Catalase Liver Enzyme Lab; SB1b Background: All organisms rely on enzymes to catalyze chemical reactions. Concept 4: Chemical Reactions Investigate relationships between reactants and products in chemical reactions. Background: All organisms rely on enzymes to catalyze chemical reactions. This lab contains material copywritten by. Le Chatelier’s Principle: Le Chatelier’s Principle Mg(OH)2 Mg+2 + 2 OH-1 In a plate well, an aqueous solution of MgCl2, to which phenolphthalein is added, is treated with an aqueous solution of NaOH till the solution turns pink. Attach a photo of your setup with the mini-funnel/filter. You will consider the following reaction types: combination reactions, decomposition reactions, single-replacement reactions, double-replacement reactions, and combustion reactions. In combination reactions, two or more reactants form one product. If the lab was accurately done, the amount of copper that was left over should have theoretically weighed the same as the weight of initial copper. The experiment is conducted by putting an aqueous reaction solution into oil and shaking the mixture vigorously.