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Consider a 0.60- M solution of HC 3 H 5 O 3 , lactic acid ( K a = 1.4 × 10 −4 ). a. Which of the following are major species in the solution? i. HC 3 H 5 O 3 ii. C 3 H 5 O 3 − iii. H + iv. H 2 O v. OH − b. Complete the following ICE table in terms of x, the amount (mol/L) of lactic acid that dissociates to reach equilibrium. c. What is the equilibrium concentration for C 3 H 3 O 3 − ? d. Calculate the pH of the solution.

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Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

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BuyFindarrow_forward

Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 13, Problem 164CWP
Textbook Problem
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Consider a 0.60-M solution of HC3H5O3, lactic acid (Ka = 1.4 × 10−4).

a. Which of the following are major species in the solution?

i. HC3H5O3

ii. C3H5O3

iii. H+

iv. H2O

v. OH

b. Complete the following ICE table in terms of x, the amount (mol/L) of lactic acid that dissociates to reach equilibrium.

Chapter 13, Problem 164CWP, Consider a 0.60-M solution of HC3H5O3, lactic acid (Ka = 1.4  104). a. Which of the following are

c. What is the equilibrium concentration for C3H3O3?

d. Calculate the pH of the solution.

(a)

Interpretation Introduction

Interpretation: The major species in the given solution of Lactic acid (CH3CH(OH)COOH) , missing values in the stated ICE table, the equilibrium concentration of C3H5O3 and the pH of solution is to be stated.

Concept introduction: Lactic acid is a α- hydroxyl acid and is more acidic than acetic acid due to the intramolecular hydrogen bonding. It is a chiral compound and dissociates in water as a weak acid.

To determine: The major species in the given solution of Lactic acid (CH3CH(OH)COOH) .

Explanation of Solution

Explanation

The major species in solution are lactate ion (C3H5O3) and H+ .

The dissociation reaction of Lactic acid in aqueous solution is,

CH3

 (b)

Interpretation Introduction

Interpretation: The major species in the given solution of Lactic acid (CH3CH(OH)COOH) , missing values in the stated ICE table, the equilibrium concentration of C3H5O3 and the pH of solution is to be stated.

Concept introduction: Lactic acid is a α- hydroxyl acid and is more acidic than acetic acid due to the intramolecular hydrogen bonding. It is a chiral compound and dissociates in water as a weak acid.

To determine: The missing values in the given ICE table.

(c)

Interpretation Introduction

Interpretation: The major species in the given solution of Lactic acid (CH3CH(OH)COOH) , missing values in the stated ICE table, the equilibrium concentration of C3H5O3 and the pH of solution is to be stated.

Concept introduction: Lactic acid is a α- hydroxyl acid and is more acidic than acetic acid due to the intramolecular hydrogen bonding. It is a chiral compound and dissociates in water as a weak acid.

To determine: The equilibrium concentration of C3H5O3 .

(d)

Interpretation Introduction

Interpretation: The major species in the given solution of Lactic acid (CH3CH(OH)COOH) , missing values in the stated ICE table, the equilibrium concentration of C3H5O3 and the pH of solution is to be stated.

Concept introduction: Lactic acid is a α- hydroxyl acid and is more acidic than acetic acid due to the intramolecular hydrogen bonding. It is a chiral compound and dissociates in water as a weak acid.

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Chapter 13 Solutions

Chemistry: An Atoms First Approach
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