logarithm story problem

Question

The concentration of hydrogen ions in household dish detergent is 10^-12. What is the pH level of household dish detergent?

Answer 1

Hi Alissa,

 

pH = -log([H⁺])

where [H⁺] is the hydrogen ion concentration 

pH = -log(10^-12)

= - (-12) log 10

= 12*1

= 12