Explanation Reason for correct answer: At halfway to equivalence point of the effective buffer, pH=pK a implies the amounts of weak acids and conjugate base are equal. From the graph, the halfway equivalence point is 12.5 mL. So the pH required at 12.5 mL of NaOH solution is given below. From the above graph, the corresponding pH to 12.5 mL is 4.50. Thus 4 .50 = pK a The relationship between pK a and K a is K a = 10 -pK a To calculate the K a substitute pK a

Chemistry: Structure and Properties (2nd Edition)

2nd Edition

ISBN: 9780134293936

Author: Nivaldo J. Tro

Publisher: PEARSON

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.

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Chapter 17, Problem 11SAQ

Interpretation Introduction

Interpretation:

The $K_{a}$ value for the unknown acid should be determined.

Concept introduction:

$K_{a}$ is the acid dissociation constant which measures the strength of an acid in the solution. $K_{a}$ represents the relationship between the concentration of reactant and products.

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Chapter 17, Problem 10SAQ

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Chapter 17 Solutions

Chemistry: Structure and Properties (2nd Edition)

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The K a value for the unknown acid should be determined. Concept introduction: K a is the acid dissociation constant which measures the strength of an acid in the solution. K a represents the relationship between the concentration of reactant and products.

Solution Summary: The author explains that K a is the acid dissociation constant which measures the strength of an acid in the solution.

Concept explainers

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Interpretation:

The $K_{a}$ value for the unknown acid should be determined.

Concept introduction:

$K_{a}$ is the acid dissociation constant which measures the strength of an acid in the solution. $K_{a}$ represents the relationship between the concentration of reactant and products.

Want to see the full answer?

Chapter 17 Solutions

The K a value for the unknown acid should be determined. Concept introduction: K a is the acid dissociation constant which measures the strength of an acid in the solution. K a represents the relationship between the concentration of reactant and products.

Solution Summary: The author explains that K a is the acid dissociation constant which measures the strength of an acid in the solution.

Concept explainers

Videos

Interpretation: The Ka value for the unknown acid should be determined. Concept introduction: Ka is the acid dissociation constant which measures the strength of an acid in the solution. Ka represents the relationship between the concentration of reactant and products.

Want to see the full answer?

Chapter 17 Solutions

Interpretation:

The $K_{a}$ value for the unknown acid should be determined.

Concept introduction:

$K_{a}$ is the acid dissociation constant which measures the strength of an acid in the solution. $K_{a}$ represents the relationship between the concentration of reactant and products.