The correct diagram for buffer solution of H 2 A acid should be selected from the given diagram. Concept Introduction: A buffer solution is a mixture of weak acid or base with its conjugate base that resists any change in pH of the solution even after the addition of a little amount of acid or base. Thus there is no change in pH of buffer solution even after the addition of acid or base to the solution. This is because weak acid reacts with excess ions to form its conjugate base and water whereas the conjugate base reacts with excess ions to form a respective weak acid.

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Chapter 9, Problem 94P

Interpretation Introduction

Interpretation:

The correct diagram for buffer solution of H2A acid should be selected from the given diagram.

Concept Introduction:

A buffer solution is a mixture of weak acid or base with its conjugate base that resists any change in pH of the solution even after the addition of a little amount of acid or base. Thus there is no change in pH of buffer solution even after the addition of acid or base to the solution. This is because weak acid reacts with excess ions to form its conjugate base and water whereas the conjugate base reacts with excess ions to form a respective weak acid.

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