The active agent in many hair bleaches is hydrogen peroxide.The amount of H2O2in 14.8 g of hair bleach was determined bytitration with a standard potassium permanganate solution: MnO4⁻(aq)+5H₂O₂(aq)+H⁺(aq)→5O₂(g)+2Mn²⁺(aq)+8H₂O(l) (a) How many moles of MnO₄ were required for the titration if 43.2 mL of 0.105 M KMnO₄ was needed to reach the end point?(b) How many moles of H₂O₂ were present in the 14.8-g sampleof bleach?(c) How many grams of H₂O₂were in the sample?(d) What is the mass percent of H₂O₂ in the sample?(e) What is the reducing agent in the redox reaction?
The active agent in many hair bleaches is hydrogen peroxide.The amount of H2O2in 14.8 g of hair bleach was determined bytitration with a standard potassium permanganate solution: MnO4⁻(aq)+5H₂O₂(aq)+H⁺(aq)→5O₂(g)+2Mn²⁺(aq)+8H₂O(l) (a) How many moles of MnO₄ were required for the titration if 43.2 mL of 0.105 M KMnO₄ was needed to reach the end point?(b) How many moles of H₂O₂ were present in the 14.8-g sampleof bleach?(c) How many grams of H₂O₂were in the sample?(d) What is the mass percent of H₂O₂ in the sample?(e) What is the reducing agent in the redox reaction?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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The active agent in many hair bleaches is hydrogen peroxide.The amount of H2O2in 14.8 g of hair bleach was determined bytitration with a standard potassium permanganate solution: MnO4⁻(aq)+5H₂O₂(aq)+H⁺(aq)→5O₂(g)+2Mn²⁺(aq)+8H₂O(l) (a) How many moles of MnO₄ were required for the titration if 43.2 mL of 0.105 M KMnO₄ was needed to reach the end point?(b) How many moles of H₂O₂ were present in the 14.8-g sampleof bleach?(c) How many grams of H₂O₂were in the sample?(d) What is the mass percent of H₂O₂ in the sample?(e) What is the reducing agent in the redox reaction?
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