   Chapter 15, Problem 15.68QP General Chemistry - Standalone boo...

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

Solutions

Chapter
Section General Chemistry - Standalone boo...

11th Edition
Steven D. Gammon + 7 others
ISBN: 9781305580343
Textbook Problem

Obtain the pH corresponding to the following hydronium-ion concentrations. a 1.0 × 10−4 M b 3.2 × 10−10 M c 2.3 × 10−5 M d 2.91 × 10−11 M

Interpretation Introduction

Interpretation:

From the given concentrations pH has to be obtained.

Concept introduction:

pH is an logarithmic expression to express a solution is acidic, basic or neutral. pH scale lies values between 1-14 and on which 7 is neutral, below 7 values are more acidic in nature and above 7 values are more basic in nature.

The pH is equal to -log10c

Where, c is hydrogen ion concentration in moles per liter.

Explanation

(a)

The given concentration is 1.0 ×10-4M

Substitute this value in the above formula and do some mathematical calculations then we get final answer as follows.

-log (1.0 ×10-4)=4.000=4.00

(b)

The given concentration is 3.2 ×10-10M

Substitute this value in the above formula and do some mathematical calculations then we get final answer as follows.

-log (3.2 ×10-10)=9.494=9.49

(c)

The given concentration is 2

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