   # What are the major species present in 0.250 M solutions of each of the following acids? Calculate the pH of each of these solutions. a. HOC 6 H 5 b. HCN ### Chemistry: An Atoms First Approach

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

#### Solutions

Chapter
Section ### Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 13, Problem 64E
Textbook Problem
24 views

## What are the major species present in 0.250 M solutions of each of the following acids? Calculate the pH of each of these solutions.a. HOC6H5b. HCN

(a)

Interpretation Introduction

Interpretation: The major species present in 0.250M solutions of the given acids and the pH value of these solutions is to be calculated.

Concept introduction: The pH of a solution is define as a figure that expresses the acidity of the alkalinity of a given solution. A logarithmic scale is used on which, the value 7 corresponds to a neutral species, a value less than 7 corresponds to an acid and a value greater than 7 corresponds to a base.

The pH of a solution is calculated by the formula, pH=log[H+]

To determine: The major species present in 0.250M solution of C6H5OH and the pH of this solution.

### Explanation of Solution

Explanation

The major species present in 0.250M solution of C6H5OH are C6H5OH and H2O .

C6H5OH is a weak acid. Hence, it does not completely dissociate in water.

The major species present in the given solution of C6H5OH are C6H5OH and H2O .

The equilibrium constant expression for the stated dissociation reaction is,

Ka=[H+][C6H5O][C6H5OH]

C6H5OH is a comparatively stronger acid than H2O .

The dominant equilibrium reaction for the given case is,

C6H5OH(aq)H+(aq)+C6H5O(aq)

At equilibrium, the equilibrium constant expression is expressed by the formula,

Ka=ConcentrationofproductsConcentrationofreactants

Where,

• Ka is the acid dissociation constant.

The equilibrium constant expression for the given reaction is,

Ka=[H+][C6H5O][C6H5OH] (1)

The [H+] is 6.3×10-6M_ .

The change in concentration of HNO2 is assumed to be x .

The ICE table for the stated reaction is,

C6H5OH(aq)H+(aq)+C6H5O(aq)Inititialconcentration0.25000Changex+x+xEquilibriumconcentration0.250xxx

The equilibrium concentration of [C6H5OH] is (0.250x)M .

The equilibrium concentration of [H+] is xM

(b)

Interpretation Introduction

Interpretation: The major species present in 0.250M solutions of the given acids and the pH value of these solutions is to be calculated.

Concept introduction: The pH of a solution is define as a figure that expresses the acidity of the alkalinity of a given solution. A logarithmic scale is used on which, the value 7 corresponds to a neutral species, a value less than 7 corresponds to an acid and a value greater than 7 corresponds to a base.

The pH of a solution is calculated by the formula, pH=log[H+]

To determine: The major species present in 0.250M solution of HCN and the pH of this solution.

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts
Legumes are a particularly nutritious choice among protein-rich foods because they also provide a. vitamin C an...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What are the features of a healthy high-fat diet?

Understanding Nutrition (MindTap Course List)

How long does it take light to cross the diameter of our Milky Way Galaxy?

Horizons: Exploring the Universe (MindTap Course List)

Describe the basic elements of bone tissue.

Human Biology (MindTap Course List)

A disk having moment of inertia 100 kg m2 is free to rotate without friction, starting from rest, about a fixe...

Physics for Scientists and Engineers, Technology Update (No access codes included)

How does the oceans density stratification limit the vertical movement of seawater?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin

The genetic material of HIV is __________. a. DNA b. RNA c. protein d. lipids

Biology: The Unity and Diversity of Life (MindTap Course List) 