Consider the qualities of a reliable experiment as a

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of time needed for the reaction to finish. Consider the qualities of a reliable experiment, as a large part of your grade will be based on how valid your methods are. Some ideas to consider: How many temperatures and particle sizes will you test? How many trials will you run for each condition? How will you ensure the experiment is controlled? After you submit your Methods, you will run your experiment(s) and collect data in an organized table (that you will create). You may want to collect both quantitative and qualitative data. Notes: Safety note on temperature: Do not place a beaker of vinegar directly on a hot plate. Use a hot water bath, and do not let the water boil. (For a pictuer of how to construct a hot water bath, see - 5/qual_cat/graphics/procedure/proc2.gif) Use test tubes rather than beakers so that the antacid is more easily submerged in vinegar, calling for less vinegar. Background Research: How do antacids work in the stomach? What are the active ingredients in the antacids that you are working with? Write a balanced reaction between baking soda and vinegar. (Note: when carbonic acid is formed in water, it breaks down into carbon dioxide and water)
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Data: Present ALL of your data in a neat and organized table(s). Note that you will create your own data table(s). Any qualitative data that you collect should also be presented in an organized fashion. Analysis: 1. What temperature and particle size lead to the quickest reaction rate? Support your answer with data. 2. i) Using the antacid label, determine the grams of baking soda per tablet ii) Calculate the TOTAL number of grams of baking soda in the whole package iii) Find the price of the package on cvs.com, and determine the price per gram of baking soda iv) Calculate the TOTAL number of moles of baking soda in the whole package v) Determine the percent by mass (percent composition) of baking soda per Alka Seltzer tablet. vi) Suppose that a chemist needs to increase the rate of reaction between two reagents in the lab. What could that chemist do?
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  • Fall '12
  • Pitt
  • Reaction, particle size, Background Research

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