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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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Section
BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. Write the formulas for three combinations of weak acid and salt that would act as buffered solutions. For each of your combinations, write chemical equations showing how the components of the buffered solution would consume added acid and base.

Interpretation Introduction

Interpretation:

Formulas for three combinations of weak acid and salt that would act as buffered solutions should be written. Then the chemical equations showing how the components of the buffered solution would consume added acid and base should be written.

Concept Introduction:

A buffered solution is a solution that does not change the pH of the solution when small amount of strong acid or base is added to it. A solution is buffered by the presence of a weak acid/conjugated base pair.

Explanation

1. Na2 H2 PO4 - / Na2 HPO4 2 - buffered system

When an acid is added,

HPO42-+H+H2PO4-

When a base is added,

H2PO4-+OH-HPO42-+H2O

2. H2 CO3 / HCO3 - buffered system

When an acid is added,

HCO3-+H+H2CO

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