Reaction Rate and Surface Area
VIDEO LINKS:
Lab Experiments (Write protocols and perform experiments based on these):
Effect of Surface Area on Reaction RateThe prelab must include Experimental Protocol, Chemical Table and Equipment Table.
The lab report requires all sections (including prelab sections) to be completed in one document.
Experimental Protocol
(Analysis) Watch the experiment videos. Take notes on the protocol. Stop the video and re-watch as necessary to acquire the details of the procedure. Write out the protocol for each part of the experiment. (It can be written in sequential steps. Complete sentences are not necessary.) This is the protocol you will follow, so be detailed.
Chemical Table
(Representation) Prepare your chemical table including the materials you will use in the experiment. Here is a general template that you may use.
| Chemical Name | Chemical Formula | Molar Mass (g/mol) | Hazards | Reference | PPE |
| Sodium Chloride | NaCl | 58.5 | Skin irritation | https://fscimage.fishersci.com/msds/21105.htm | |
Equipment Table
(Analysis) Identify the equipment (type AND size) needed for the experiment and include the name and an image of each. Be sure to describe the equipment, how to use it, and why it is suitable for this use.
| Equipment Name | Equipment Picture | Intended Purpose |
Data Collection
- (Acquiring competencies) Following your detailed protocol based on the videos, perform all the experiments. Record your observations and take pictures of your key steps in the process. Your observations and images need to be incorporated in your data section and this section should be as detailed as possible as you will use this information to complete your discussion.
- (Experimental Design) Choose parameters to vary, and others to hold constant and repeat the experiment at least twice each time for reliability of results. Organize results below.
Data Processing
- (Assumptions and Analysis) Fill in the following table using the observations and data from your experiments.
| Assumptions made | Testing the assumption | If assumptions are wrong ... |
| Soap is necessary for the reaction | Perform the experiment without soap. | Changes will be apparent. |
| Alka Seltzer is the only material that reacts differently when particle size is changed | ||
Discussion
Write a minimum one-page (12 font, single spaced) discussion on the experiment conducted this week. Address at least one question in each category as fully as possible integrating the collected data, providing explanations for the observed trends, and evaluating whether your original assumptions about the experiment were validated by the results. The assignment will be graded on completeness, clarity of the explanations and the meaningful integration of the collected and calculated data. Correct grammar and appropriate format for the chemical formulae and chemical reactions is expected. You may use the outline included at the end of this document on how to build your essay to address each category.
- (Existing knowledge, research, and views) Define chemical kinetics, and discuss the influence of collisions and energy. Provide a reference.
- (Existing knowledge, research, and views) List the factors that affect the rate of a reaction. (HINT: there are 5.) Provide a reference.
- (Analysis) Identify the variable that is changed in each of our experiments ( Alka-Seltzer and vinegar)
- (Analysis) Use the results of your experiments, to evaluate the effect of your identified variable for the Alka-Seltzer experiment on the rate of reaction and use your observations as supporting arguments.
- (Analysis) Predict what would happen if you carried out the Alka-Seltzer reaction in the Mojave Desert in summer and provide a supported argument for your prediction.