   # The pH scale is a logarithmic scale. What is meant by this? ### Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

#### Solutions

Chapter
Section ### Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 13, Problem 11E
Textbook Problem
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## The pH scale is a logarithmic scale. What is meant by this?

Interpretation Introduction

Interpretation:

The reason why the pH scale is a logarithm scale is to be explained.

Concept Introduction:

A logarithm scale is a nonlinear scale often used to analyze a large range of quantities. In this, each interval is increased by a factor of the base of the logarithm. Generally, a base ten scale is used and its equation is as follows:

y = log10(x)10y =x

In chemistry, the pH scale is a logarithm scale which is used to define the acidity or basicity of an aqueous solution. This scale is a logarithm, which means with each of the one-digit changes in pH, the acidity or H+ concentration changes by ten times.

### Explanation of Solution

pH is an incredibly important parameter to determine the acidity or basicity of an acid or a base or a solution. In general, a small pH value describes acidic character of a solution and a large pH value describes the basic character of a solution. The pH scale is centered at 7, which means at a pH value of 7, the solution is neutral (nether acidic nor basic).

The ‘p’ of pH describes shorthand mathematical notation for – ‘log’ and the ‘H’ is shorthand notation for ‘molar concentration of hydrogen ions (H+)’, which is written as [H+]

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