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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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Chapter
Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 13, Problem 2SC
Textbook Problem
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HF is a weak acid. Which statement is true for an HF solution?

All of the HF molecules dissociate in solution.

Some of the HF molecules dissociate in solution.

None of the HF molecules dissociate in solution.

Interpretation Introduction

Interpretation:

Out of the given options, the correct property regarding HF is to be determined.

Concept Introduction:

Acid strength is determined by the extent to which it ionizes in an aqueous solution. A strong acid is the one that completely ionizes in a solution, whereas a weak acid is a one which partially ionizes in a solution.

Explanation of Solution

Reason for the correct option:

Weak acids partially ionize in water. Since hydrogen fluoride (HF) is a weak acid, it does not ionize fully when dissolved in water, or does not donate all of its hydrogen ions in a solution, because the ions are too strongly bound to each other.

HF(aq) + H2O(l) H3O+(aq) + F-(aq)

Hence, option (b) is correct.

Reason for the incorrect options:

Option (a) is incorrect because only strong acids fully dissociate in a solution

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Chapter 13 Solutions

Chemistry In Focus
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