1. A 2.2g methyl paraben (mEq of 0.152) wasassayed using 50 ml of SodiumHydroxide, 1.250 N and it consumed 31 ml toof 1.100N sulfuric acid to titrate the excess. Inthe blank, 42ml of the same acid solution wasconsumed. What is the percentage purity ofMethylparaben?2. If 25 ml of HCI solution required 26.25 mlof 0.0952N sodium hydroxide in a titration,what volume of the solution would produce0.2867g of AgCl? (determine the N of acidsolution, then use it for the volume that willreact with AgCl)3. A hydrochloric acid solution has AgCl titerof 0.1265, what is its Na2CO3 titer. (determine the normality of acid using titervalue of AgCl, then determine titer value ofsodium carbonate)4. Determine the weight of pure urea in a 500mg sample if 15.35 ml of 0.4967N NaOH wererequired in the titration after the ammoniafrom the sample had been distilled into 50.0ml of 0.4861N H2SO4.

We have find out the percent purity of methyl paraben in the sample.

1. A 2.2g methyl paraben (mEq of 0.152) was assayed using 50 ml of Sodium Hydroxide, 1.250 N and it consumed 31 ml to of 1.100N sulfuric acid to titrate the excess. In the blank, 42ml of the same acid solution was consumed. What is the percentage purity of Methylparaben?

1. A 2.2g methyl paraben (mEq of 0.152) was assayed using 50 ml of Sodium Hydroxide, 1.250 N and it consumed 31 ml to of 1.100N sulfuric acid to titrate the excess. In the blank, 42ml of the same acid solution was consumed. What is the percentage purity of Methylparaben?

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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Question

1. A 2.2g methyl paraben (mEq of 0.152) was
assayed using 50 ml of Sodium
Hydroxide, 1.250 N and it consumed 31 ml to
of 1.100N sulfuric acid to titrate the excess. In
the blank, 42ml of the same acid solution was
consumed. What is the percentage purity of
Methylparaben?
2. If 25 ml of HCI solution required 26.25 ml
of 0.0952N sodium hydroxide in a titration,
what volume of the solution would produce
0.2867g of AgCl? (determine the N of acid
solution, then use it for the volume that will
react with AgCl)
3. A hydrochloric acid solution has AgCl titer
of 0.1265, what is its Na2CO3 titer. (
determine the normality of acid using titer
value of AgCl, then determine titer value of
sodium carbonate)
4. Determine the weight of pure urea in a 500
mg sample if 15.35 ml of 0.4967N NaOH were
required in the titration after the ammonia
from the sample had been distilled into 50.0
ml of 0.4861N H2SO4.

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