Question

The [H3O+] of a solution with pH = 2.0 is.

Answer 1

Answer:

$[H_{3}O^{+} ] = 10^{-2}$ mol/ L

Explanation:

Measure of  [H₃O⁺] , i.e hydrogen ion concentration, indicates the acidity of the solution. The greater the concentration, the greater is the acidity.  [H₃O⁺], this quantity can range from 10⁻¹ to 10⁻¹⁴ at ambient temperature(298K). This range is always temperature dependent.

Measure of acidity of a solution is expressed more conveniently using the notation of pH.

$pH = - log_{10}[H_{3}O^{+} ]$

Using the above formula

$[H_{3}O^{+} ] = 10^{-(pH)}$

$[H_{3}O^{+} ] = 10^{-2}$ mol/ L