Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:POST-LAB QUESTIONS:
1) Why are solutions standardized?
2) Why was a back-titration needed for the antacid?
3) What other indicators could have been used for the standardization of HCl and NaOH?
4) What would be the consequence of competing equilibria, such as from other ingredients in the tablet, on your results? What if there were several pain relievers in the same tablet? How could the error from these interferences be minimized?
5) Ethanol was used in the solutions to help dissolve the aspirin. Ethanol is slightly acidic and will react with NaOH. Describe a blank correction experiment, i.e., what experiment you might do to determine how much NaOH reacts with the ethanol in your solution. Once you have determined this, how would you use the results of a blank correction experiment in the data analysis?
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