Answer to Question #163757 in Organic Chemistry for janet

Question

Assay of Tartaric Acid USP 99.7-100.5%

1. Accurate weigh 2 grams of previously dried tartaric acid.

2. Transfer to a conical flask then add 40 milliliters of water. Mix to dissolve.

3. Add phenolphthalein TS.

4. Equally divide into three Erlenmeyer flasks.

5. Fill in the buret with previously standardized sodium hydroxide (1.013N), then conduct the titration.

6. Record the data for the three trials, then compute for the individual and average percentage purity.

Questions:

1. The burette was filled up to the 0 ml mark, what is the volume consumed for Trial 1?
2. The burette was filled up to the 0 ml mark, what is the volume consumed for Trial 2?
3. The burette was filled up to the 0 ml mark, what is the volume consumed for Trial 3?
4. The accurately weighed analyte dissolved in the matrix, then was equally divided into three Erlenmeyer flasks. What is the weight of the analyte in each flask?
5. What is the molecular weight of the analyte?
6. What is the meq of the analyte?
7. What is the titer value?
8. What is the principle involved in the essay?
9. What is the percentage purity for Trial 1?
10. What is the percentage purity for Trial 2?
11. What is the percentage purity for Trial 3?
12. Using the previously computed individual percentages, what is the average percentage purity?
13. Did the sample conform to the official monograph?

Answer 1

23ml

23.2ml

23.1ml