There are various factors, such as surface area and temperature, which can influence the rate of a chemical reaction. In this assignment, you will investigate how a change in one factor can affect the rate of a chemical reaction.
Instructions
Your task is to plan and conduct a simple experiment to test a factor that affects the rate of a chemical reaction. In this experiment, you will use some commonly household materials to plan and conduct your tests.
- Determine an appropriate ‘Testable Question’.
- Propose a reasonable hypothesis based on your ‘Testable Question’.
- Develop a procedure based on your ‘Testable Question’.
- Submit your procedure for review by your teacher prior to beginning your test(s).
Step 1: Planning Your Experiment
- Determine the testable question you wish to investigate. If you have trouble thinking of a testable question, review the information on factors that affect the rate of reactions for ideas. Ensure that your testable question can be answered using quantifiable data and not simply qualitative observations. A few testable questions are highlighted on this page. Feel free to use one of the provided questions or create your own.
- Once you have decided on your testable question, propose a reasonable hypothesis for the experiment you plan to conduct. Your hypothesis should explain how the change in your independent variable will affect your dependent variable. As previously stated, the change in your dependent variable should be quantifiable.
- Develop the procedure for the experiment you intend to conduct to test your hypothesis. Your procedure should be very specific and detailed, allowing another scientist to recreate your experiment using the exact steps you used in your investigation. Write the steps of the procedure in the past tense.
- Upload your testable question, hypothesis, and planned procedure to the Assignment: Rate of Reaction Dropbox. Your teacher will review your work to ensure your experimental set-up is correct.
Possible Testable Questions
- How does concentration of the reactants affect the reaction rate?
- How does the surface area of the reactants affect the reaction rate?
- How does temperature affect the reaction rate?
- How does pressure affect the reaction rate?
Materials
You are to design a procedure to test your selected factor using any of the materials listed:
- Antacid tablets
- Ice water
- Warm water
- Vinegar
- Baking soda
- Clear drinking glasses (or beakers)
- Mortar and pestle
- Small sealable container
- Stopwatch
- Thermometer
Step 2: Conducting Your Experiment
- Apply any feedback from your teacher to your planned experiment.
- Conduct your experiment to test your hypothesis.
Step 3: Communicating Your Results
- Once you have completed your test(s), communicate your results in a lab report.
- Your lab report should include the following sections: variables, testable question, hypothesis, materials, procedure, observations, results, discussion, and conclusion.
Assessment Details
Your submission should include the following:
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