Question

A solution with a hydrogen ion concentration of 0.0001 M has a pH of ________, and is therefore _________.

Answer 1

Answer:

pH is the -(log10 of [H+]), i.e. [H+] is your hydrogen ion concentration. So, 0.0001 = 10^-4 and the log10 of 10^-4 is -4. What log10 represents is: what do you have to multiple 10 by to get 0.0001.

Answer 2

The $pH$ of solution having 0.0001 M concentration is 3.39 and therefore, it is an acid.

Explanation:

• The pH of a solution tells us about the hydrogen ion concentration in the solution.
• The acids have a large hydrogen ion concentration and bases have higher hydroxide ion concentration.
• The formula for calculating the pH is -log[H⁺].
• Now we will apply this formula to find the pH of the solution:

        H⁺ ion concentration is 0.0001 M

        $pH=-log[0.0004]\\\\pH=-log[4*10^{-4} ]\\\\pH=-log[10^{-4}]-log4\\\\pH=4log10-log4\\\\pH=4-0.602\\\\pH=3.39$

• As the pH is 3.39 i.e., less than 7, it is an acid.