chem assignment 10

Name __________________________

Module 10

Post-Lab Assignment

Short Answer (30 points)

Answer the following questions based on material covered in this module. (5 points each.)

(You must use complete sentences when answering each question.

1-point deduction per question not answered in complete sentences.)

1) Based on your results, which antacid is most efficient, 1 tablet of Tums or ¼ teaspoon of baking soda? Explain.

2) In this experiment, is the NaOH neutralizing the antacid? How do you know?

3) If you were to overshoot the endpoint and the final solution is a deep violet-blue, what would that do to the perceived efficiency of the antacid being analyzed? (Would it appear to be more or less efficient than it actually is?) Explain.

4) Think through the entire procedure and describe one possible unavoidable experimental error that could contribute to a poor analysis for the antacids. (Misreading the glassware and calculation errors do not count as unavoidable experimental errors.)

5) What would happen if you forgot to add the bromophenol blue indicator to the upset stomach? Explain.

6) What does your graph from the Hands-On Experiment tell us about the reaction you carried out? Explain.