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Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097

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BuyFindarrow_forward

Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097
Textbook Problem

Which of the following mixtures would result in a buffered solution when 1.0 L of each of the two solutions are mixed?

a. 0.2 M HNO3 and 0.4 M NaNO3

b. 0.2 M HNO3 and 0.4 M HF

c. 0.2 M HNO3 and 0.4 M NaF

d. 0.2 M HNO3 and 0.4 M NaOH

Interpretation Introduction

Interpretation:

The mixtures that would result in buffered solution are to be identified from the given list.

Concept introduction:

A solution that contains mixture of a weak acid and its conjugate base or weak base and its conjugate acid is known as buffer solution. This solution resists any gross change in pH .

Explanation

Explanation

(a)

HNO3 is a strong base, whereas NaNO3 is a weak base. The dissociation of NaNO3 gives Na+ and NO3 . The ion NO3 is the conjugate weak base of HNO3 . The formation of buffer solution requires weak acid and weak base. Hence, it will not form a buffer solution.

(b)

HNO3 is a strong base, whereas HF is also an acid. Hence, it will not form a buffer solution.

(c)

HNO3 is a strong base, whereas NaF is a weak base. The dissociation of NaNO3 gives Na+ and NO3

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