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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

Consider the titration curve in Exercise 115 for the titration of Na2Cr3 with HCl.

a. If a mixture of NaHCO3 and Na2CO3 was titrated, what would be the relative sizes of V1, and V2?

b. If a mixture of NaOH and Na2CO3 was titrated, what would be the relative sizes of V1 and V2?

c. A sample contains a mixture of NaHCO3 and Na2CO3. When this sample was titrated with 0.100 M HCl, it took 18.9 mL to reach the first stoichiometric point and an additional 36.7 mL to reach the second stoichiometric point. What is the composition in mass percent of the sample?

(a)

Interpretation Introduction

Interpretation: The titration curve of Na2CO3 and HCl 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.

To determine: The size of V1 and V2 when a mixture of NaHCO3 and Na2CO3 was titrated.

Explanation

Explanation

The reaction between the given acid and base is shown as,

Na2CO3+HClNaHCO3+NaClNaHCO3+HCl

(b)

Interpretation Introduction

Interpretation: The titration curve of Na2CO3 and HCl 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.

To determine: The size of V1 and V2 when a mixture of NaOH and Na2CO3 was titrated.

(c)

Interpretation Introduction

Interpretation: The titration curve of Na2CO3 and HCl 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.

To determine: The mass percentage of CO32 and HCO3 in the given solution.

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