The pH of a solution changes fro 300 to 6.00. By what factor does the [H_3O^+] change?

1 Answer
Feb 26, 2017

By a factor of 1000.

Explanation:

pH=-log_10[H_3O^+]

If pH_1=3.00, then [H_3O^+]=10^-3*mol*L^-1.

If pH_2=6.00, then [H_3O^+]=10^-6*mol*L^-1.

(pH_1)/(pH_2)=(10^-3*mol*L^-1)/(10^-6*mol*L^-1)=10^3

The latter concentration is less concentrated with respect to H_3O^+ than the former by a factor of 1000.