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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

The following plot shows the pH curves for the titrations of various acids by 0.10 M NaOH (all of the acids were 50.0-mL samples of 0.10 M concentration).

Chapter 15, Problem 90AE, The following plot shows the pH curves for the titrations of various acids by 0.10 M NaOH (all of

a. Which pH curve corresponds to the weakest acid?

b. Which pH curve corresponds to the strongest acid? Which point on the pH curve would you examine to see if this acid is a strong acid or a weak acid (assuming you did not know the initial concentration of the acid)?

c. Which pH curve corresponds to an acid with Ka ≈ 1 × 10−6?

(a)

Interpretation Introduction

Interpretation: The titration curve obtained after the reaction of various acids with NaOH is given. Various questions based on the given curve are to be answered.

Concept introduction: Titration is a quantitative chemical analysis method that is used for the determination of concentration of an unknown solution. In acid base titration, the neutralization of either acid or base is done with a base or acid respectively of known concentration. This helps to determine the unknown concentration of acid or base.

Explanation

Explanation

The curve f has the highest pH and therefore, it belongs to weak acid.

The strength of an acid is determined by the value of pH . When the value of pH lies in between 07 , the given solution is acidic in nature. But when the value of pH lies in between 714 , the given solution is basic in nature

(b)

Interpretation Introduction

Interpretation: The titration curve obtained after the reaction of various acids with NaOH is given. Various questions based on the given curve are to be answered.

Concept introduction: Titration is a quantitative chemical analysis method that is used for the determination of concentration of an unknown solution. In acid base titration, the neutralization of either acid or base is done with a base or acid respectively of known concentration. This helps to determine the unknown concentration of acid or base.

(c)

Interpretation Introduction

Interpretation: The titration curve obtained after the reaction of various acids with NaOH is given. Various questions based on the given curve are to be answered.

Concept introduction: Titration is a quantitative chemical analysis method that is used for the determination of concentration of an unknown solution. In acid base titration, the neutralization of either acid or base is done with a base or acid respectively of known concentration. This helps to determine the unknown concentration of acid or base.

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