Answer: [tex]10^{-13}M[/tex]
Explanation:-
pH is the measure of acidity or alkalinity of a solution.
Acids have pH ranging from 1 to 6.9 and bases have pH ranging from 7.1 to 14.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
[tex]pH=-\log [H^+][/tex]
We are given:
Household bleach has a pH of 13
[tex]13=-log{H^+}[/tex]
[tex][H^+]=antilog(-13)[/tex]
[tex][H^+]=10^{-13}[/tex]
Thus [tex]H_3O^+[/tex] concentration in household bleach is [tex]10^{-13}M[/tex].
