(a) Explanation The pH of the diluted solution is given in the problem statement as 13.25 . From this the pOH of the solution can be calculated as shown below; pH + pOH = 14.0 pOH = 14.0 − 13.25 = 0.75 Molar concentration of hydroxide ion in diluted solution: The molar concentration of the hydroxide ions present in the diluted solution is calculated using the pOH value as shown below; pOH = − log [ OH − ] [ OH − ] = 10 − pOH = 10 − 0.75 = 0.18 M Therefore, the molar concentration of hydroxide ion in diluted solution is 0 .18 M (b) Interpretation Introduction Interpretation: Mass of Na 2 O that is added to prepare sodium hydroxide has to be calculated.

Chemical Principles: The Quest for Insight

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ISBN: 9781464183959

Author: Peter Atkins, Loretta Jones, Leroy Laverman

Publisher: W. H. Freeman

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Chapter 6, Problem 6B.11E

(a)

Interpretation Introduction

Interpretation:

Molar concentration of hydroxide ion in the diluted solution and the original solution has to be calculated.

(b)

Interpretation Introduction

Interpretation:

Mass of Na2O that is added to prepare sodium hydroxide has to be calculated.

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Chapter 6, Problem 6B.10E

Chapter 6, Problem 6B.12E

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Chemical Principles: The Quest for Insight

Ch. 6 - Prob. 6A.1AST Ch. 6 - Prob. 6A.1BST Ch. 6 - Prob. 6A.2AST Ch. 6 - Prob. 6A.2BST Ch. 6 - Prob. 6A.3AST Ch. 6 - Prob. 6A.3BST Ch. 6 - Prob. 6A.1E Ch. 6 - Prob. 6A.2E Ch. 6 - Prob. 6A.3E Ch. 6 - Prob. 6A.4E

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Molar concentration of hydroxide ion in the diluted solution and the original solution has to be calculated.

Solution Summary: The author calculates the molar concentration of hydroxide ions in diluted solution and the original solution using pOH.