   Chapter 16, Problem 57QAP ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
1 views

# . Calculate the hydrogen ion concentration and the pH of each of the following solutions of strong acids. a. 1.04 × 10 − 4 M HCI b. 0.00301 M HNO c. 5.41 × 10 − 4 M HClO4d. 6.42 × 1 0 − 2 M HNO3

Interpretation Introduction

(a)

Interpretation:

The pH and hydrogen ion concentration of a solution of 1.04×104 M

HCl should be calculated.

Concept Introduction:

To express the small number, p scale is used, which implies to take the log of a number. Since, the concentration of [H+] in aqueous solution is small, by using the p scale in the form of pH scale, it is better way to represent acidity of solution.

Thus, pH = -log [H+].

Explanation

Since, HCl is a strong acid, thus it is completely dissociated into ions. The reaction is shown below:

HClH++Cl

Thus, concentration of HCl that is 1.04×104 M is equal to the [H+] and [Cl-]

Therefore, [H+] = 1

Interpretation Introduction

(b)

Interpretation:

The pH and hydrogen ion concentration of a solution of 0.00301 M

HNO3 should be calculated.

Concept Introduction:

To express the small number, p scale is used, which implies to take the log of a number. Since, the concentration of [H+] in aqueous solution is small, by using the p scale in the form of pH scale, it is better way to represent acidity of solution.

Thus, pH = -log [H+].

Interpretation Introduction

(c)

Interpretation:

The pH and hydrogen ion concentration of a solution of 5.41×104 M

HClO4 should be calculated.

Concept Introduction:

To express the small number, p scale is used, which implies to take the log of a number. Since, the concentration of [H+] in aqueous solution is small, by using the p scale in the form of pH scale, it is better way to represent acidity of solution.

Thus, pH = -log [H+].

Interpretation Introduction

(d)

Interpretation:

The pH and hydrogen ion concentration of a solution of 6.42×102 M

HNO3 should be calculated.

Concept Introduction:

To express the small number, p scale is used, which implies to take the log of a number. Since, the concentration of [H+] in aqueous solution is small, by using the p scale in the form of pH scale, it is better way to represent acidity of solution.

Thus, pH = -log [H+].

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