Biology 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0-07802-426-9
ISBN 13: 978-0-07802-426-9

Chapter 2 - Basic Chemistry - Assess - Page 34: 15


The correct option is (b) the solution is 100 times more basic.

Work Step by Step

Since pH level is measured in logarithmic scale, each of the pH value below 7 is ten times more acidic than the next higher value. For example, the pH value 3 is ten times more acidic than pH 4. So, when the pH value changes from 5 to 6, the solution becomes 10 times more basic. Further, when the solution changes from pH 6 to 7 it becomes 10 times more basic again. So overall solution becomes 100 times more basic than the original solution when pH changes from 5 to 7.
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