Disposal of Waste

All waste and excess reagents should be disposed of in the labeled waste

container in the room.

Pre-Lab Questions

1. What is the balanced chemical equation for the reaction of acetic acid with

sodium hydroxide?

2. If you perform a titration that uses 25.00 mL of 5% acetic acid and 0.100 M

NaOH, how many mL of NaOH will be required to reach the equivalence point.

3. In the example calculation on the previous page we assumed that the density

is 1.0 g/mL. You determined the density of a solution in a previous lab. What

was the procedure you used to make that determination?

4. Look back at previous labs. What are the safety considerations you should use

for this lab? Write out an appropriate safety precautions section based on your

past experience.

Post-Lab Questions

1. What are the average molarities of acetic acid in each of the vinegars?

2. What are the percent acidities of acetic acid in each of the vinegars?

3. What are the relative average deviations of the percent acidities for each of

the vinegars?

4. How do the vinegars compare with regards to the acid content? Answer this

question using your data and explaining your conclusions.

5. Are the labels on the vinegars truthful? Answer this question using your data

and explaining your conclusions.

6. Is there a relationship between the cost of a vinegar and its acid content?

7. In recipes is it appropriate to substitute one vinegar for a different vinegar?

Answer this question using your data and explaining your conclusions.

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