# What are the concentrations of H 3 O + and OH − in each of the following? a 1.55 M NaOH b 0.15 M Sr(OH) 2 c 0.056 M HClO 4 d 0.47 M HCl

### General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343

### General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
Publisher: Cengage Learning
ISBN: 9781305580343

#### Solutions

Chapter
Section
Chapter 15, Problem 15.54QP
Textbook Problem

## What are the concentrations of H3O+ and OH− in each of the following? a 1.55 M NaOH b 0.15 M Sr(OH)2 c 0.056 M HClO4 d 0.47 M HCl

Expert Solution
Interpretation Introduction

Interpretation:

The concentration of H3O+andOH- in each of the given has to be determined.

Concept introduction:

The concentration of hydroxide ion or hydronium ion concentration is calculated by using the following formula.

[OH-] = Kw[H3O+]

Where,

Kw for an acid is 1.0×10-15M

Kw for an base is 1.0×10-14M

### Explanation of Solution

(a)

The given concentration that represents the OH- ion in sodium hydroxide

Therefore, The concentration of OH- is 1.55 M

Now, let’s calculate the concentration of H3O+ ion as follows.

[H3O+]Kw[OH-] = 1.0×10-141.55= 6.452×10-15 = 6.45×10-15M

(b)

The given concentration that represents the OH- ion in potassium hydroxide

Therefore, The concentration of OH- is (0.15 M) = 0.30M

Now, let’s calculate the concentration of H3O+ ion as follows.

[H3O+]Kw[OH-] = 1.0×10-140.30= 3.33×10-14 = 3.3×10-14M

(c)

The given concentration that represents the H3O+ ion in hydrogen bromide

Therefore, The concentration of H3O+ is 0

### Want to see the full answer?

Check out a sample textbook solution.See solution

### Want to see this answer and more?

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

See solution