Question

When [OH⁻] changes from 10-9to 10-11in a solution: Kw = [H+][OH-] What happens to [H+]?

Answer 1

Kw = 10^-14 so IF [OH-] changes from 10^-9 to 10^-10 the [H+] will have to change from 10^-5 to 10^-4

Answer 2

Answer: [H+] increases by 0.001 M

Explanation: here [OH-] change: 10^-9 to 10^-11

That means OH- decreased, hence [H+] increases

If [OH-]=10^-9, then [H+]=10^-14/[OH-]= 10^-14/10^-9= 10^-5 M

If OH-=10^-11, then [H+]=10^-14/10^-11=10^-3 M

So H+ increases by 10^-3 M or 0.001 M