menu
Hit Return to see all results
Chapter 14, Problem 124E
BuyFindarrow_forward

### Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097

#### Solutions

Chapter
Section
BuyFindarrow_forward

### Chemistry

9th Edition
Steven S. Zumdahl
ISBN: 9781133611097
Textbook Problem

# Consider a solution of an unknown salt having the general formula BHCl, where B is one of the weak bases in Table 13-3. A 0.10-M solution of the unknown salt has a pH of 5.82. What is the actual formula of the salt?

Interpretation Introduction

Interpretation: The general formula of an unknown salt is given to be BHCl where B a weak base is. The pH value of a 0.10M solution of the unknown salt is 5.82 . The actual formula of the salt is to be stated.

Concept introduction: The pH of a solution is define as a figure that expresses the acidity of the alkalinity of a given solution.

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

The sum, pH+pOH=14

The equilibrium constant for water is denoted by Kw and is expressed as,

Kw=[H+][OH]

The value of Kw is calculated by the formula,

Kw=KaKb

Explanation

Explanation

To determine: The actual formula of the given unknown salt.

The [H+] is 1.51×10-6M_ .

Given

pH=5.82

The pH of a solution is calculated by the formula,

pH=log[H+]

Rearrange the above expression to calculate the value of [H+] .

[H+]=10pH

Substitute the given value of pH in the above expression.

[H+]=105.82=1.51×10-6M_

The equilibrium constant expression for the given reaction is, Ka=[B][H+][BH+]

The dominant equilibrium reaction is,

BH+(aq)B(aq)+H+(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=[B][H+][BH+] (1)

The Ka is 2.28×10-11_ .

The change in concentration of BH+ is assumed to be x .

The liquid components do not affect the value of the rate constant.

The ICE table for the stated reaction is,

BH+(aq)B(aq)+H+(aq)Inititialconcentration0.1000Changex+x+xEquilibriumconcentration0

### 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

## Additional Science Solutions

#### Find more solutions based on key concepts

Show solutions add

#### Aerobically trained muscles burn fat more readily than untrained in us. T F

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

#### What are sister chromatids?

Human Heredity: Principles and Issues (MindTap Course List)