I. A solution of KMno4 (FW =158.04) was standardized with 0.2320 g K2C204.H20 (FW = 184.24)(monohydrate salt). A 25.00 mL of H2SO4was added to the oxalate and required 20.05 mL KMNO4Titration of a blank required 0.65 mL KMNO4. Calculate the molarity of KMNO4.II. A dilute peroxide solution was prepared by quantitatively diluting 10 mL stock H202 (MW = 34.0147) to250mL using a volumetric flask. 50 mL aliquot of the diluted peroxide solution was titrated using thepreviously standardized KMNO4 in problem 1. Titration of the sample required 29.00 mL titrant and theblank containing 50 mL 1:5 H2SO4 required 0.75 mL of the standard KMNO4. Calculate the concentrationin %w/v of the stock H202. (Hint: H202 produces O2 under acidic condition).II. A 1.9300 g impure sample of Fe(NHa)2(SO4)2 (FW = 392.14) was dissolved in 75 mL 0.75 M H2sO4 andwas titrated with the standard KMNO4 in problem 1. Titration of the sample required 24.00mL while theblank containing 75mL 0.75 M H2SO4 required 0.75 mL of the KMNO4 titrant. Calculate the concentrationof Fe(NH4)2(SO4)2 in %w/w in the impure sample.

Standardization is the process through which exact concentration of a substance is determined.…

1. A solution of KMNO4 (FW =158.04) was standardized with 0.2320 g K2C204.H20 (FW = 184.24) (monohydrate salt). A 25.00 mL of H2SO4was added to the oxalate and required 20.05 mL KMNO4 Titration of a blank required 0.65 mL KMNO4. Calculate the molarity of KMNO4.

1. A solution of KMNO4 (FW =158.04) was standardized with 0.2320 g K2C204.H20 (FW = 184.24) (monohydrate salt). A 25.00 mL of H2SO4was added to the oxalate and required 20.05 mL KMNO4 Titration of a blank required 0.65 mL KMNO4. Calculate the molarity of KMNO4.

Chemistry: Principles and Practice

3rd Edition

ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter14: Chemical Equilibrium

Section: Chapter Questions

Problem 14.74QE: Lead poisoning has been a hazard for centuries. Some scholars believe that the decline of the Roman...

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Question

I. A solution of KMno4 (FW =158.04) was standardized with 0.2320 g K2C204.H20 (FW = 184.24)
(monohydrate salt). A 25.00 mL of H2SO4was added to the oxalate and required 20.05 mL KMNO4
Titration of a blank required 0.65 mL KMNO4. Calculate the molarity of KMNO4.
II. A dilute peroxide solution was prepared by quantitatively diluting 10 mL stock H202 (MW = 34.0147) to
250mL using a volumetric flask. 50 mL aliquot of the diluted peroxide solution was titrated using the
previously standardized KMNO4 in problem 1. Titration of the sample required 29.00 mL titrant and the
blank containing 50 mL 1:5 H2SO4 required 0.75 mL of the standard KMNO4. Calculate the concentration
in %w/v of the stock H202. (Hint: H202 produces O2 under acidic condition).
II. A 1.9300 g impure sample of Fe(NHa)2(SO4)2 (FW = 392.14) was dissolved in 75 mL 0.75 M H2sO4 and
was titrated with the standard KMNO4 in problem 1. Titration of the sample required 24.00mL while the
blank containing 75mL 0.75 M H2SO4 required 0.75 mL of the KMNO4 titrant. Calculate the concentration
of Fe(NH4)2(SO4)2 in %w/w in the impure sample.

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