Question

Which could be the pH of an aqueous solution with a H3O+ ion concentration that is less than its OH- ion concentration?

A. 2

B. 3

C. 4

D. 9

Answer 1

Answer:

Explanation:

You can think of pH as "parts Hydrogen ion," but remember that the pH scale is "backwards." The pH scale ranges from 0 to 14, with zero being the most acidic (highest concentration of H+) and 14 being the most basic.

Answer 2

The pH of an aqueous solution will be:

D. 9

When the $H_3O^+$ ion concentration is less than its $OH^-$ ion concentration.

What does pH tell?

pH is used to indicate whether a solution is acidic or alkaline depending upon the pH of the solution. If pH is below 7 then the solution is acidic, if the pH is above 7 then the solution is basic and if the pH is 7 then the solution is neutral.

When the $H_3O^+$ ion concentration is less than its $OH^-$ ion concentration this means that the solution has more  $OH^-$ ion and this makes the solution basic.

Thus, correct option is D, i.e. pH is 9.

Find more information about pH here:

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