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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 4, Problem 97GQ
Textbook Problem
33 views

Potassium perchlorate is prepared by the following sequence of reactions:

Cl2(g) + 2 KOH(aq) → KCI(aq) + KCIO(aq) + H2O(l)

3 KCIO(aq) → 2 KCI(aq) + KCIO3(aq)

4 KCIO3(aq) → 3 KCIO4(aq) + KCI(aq)

What mass of Cl2(g) is required to produce 234 kg of KClO4?

Interpretation Introduction

Interpretation:

The mass of Cl2 required to produce 234kg of KClO4 has to be determined.

Concept introduction:

  Numberofmole=GivenmassofthesubstanceMolarmass

  • Massofthesubstance=Amountofthesubstance×Molarmass
  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mol (g/mol).
  • For chemical reaction balanced chemical reaction equation written in accordance with the Law of conservation of mass.
  • Law of conservation of mass states that for a reaction total mass of the reactant and product must be equal.
  • Stoichiometric factor is a relationship between reactant and product which is obtained from the balanced chemical equation for a particular reaction.

Explanation of Solution

The balanced chemical equation for the sequence of reactions for the preparation of KClO4 are,

  Cl2(g)+2KOH(aq)KCl(aq)+KClO(aq)+H2O(l) 3KClO(aq)2KCl(aq)+KClO3(aq) 4KClO3(aq)3KClO4(aq)+KCl(aq)

The amount (in moles) of KClO4 can be calculated by using the equation

  No.ofmole = GivenmassofthesubstanceMolarmassNo

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Chapter 4 Solutions

Chemistry & Chemical Reactivity
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Ch. 4.4 - A 0509-g sample of an unknown organic compound...Ch. 4.5 - Sodium bicarbonate, NaHCO3, is used in baking...Ch. 4.5 - An experiment calls for you to use 250. mL of 1.00...Ch. 4.5 - 1. A 1.71-g sample of Ba(OH)2(s) was dissolved in...Ch. 4.5 - You have a 100.-mL volumetric flask containing...Ch. 4.5 - 3. What volume of 0.250 M KMnO4(aq) contains 0.500...Ch. 4.6 - (a) What is the pH of a solution of HCI in which...Ch. 4.6 - Which of the solutions listed below has the lowest...Ch. 4.6 - A 0.365-g sample of HCl is dissolved in enough...Ch. 4.6 - 3. A solution has a pH of 10.54. What is the...Ch. 4.7 - If you combine 75.0 mL of 0.350 M HCl and an...Ch. 4.7 - A 25.0-mL sample of vinegar (which contains the...Ch. 4.7 - Hydrochloric acid. 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