Question #17d18

1 Answer
May 22, 2017

1.2 xx 10^-10M

Explanation:

We're trying to find the [H_3O^+] of a solution with a given pOH.

We know that pH and the pOH must add up to 14.00:

pH + pOH = 14.00

and the relationship between pH and the [H_3O^+] is

[H_3O^+] = 10^(-pH)

Thus,

pH = 14.00 - 4.07 = 9.93

[H_3O^+] = 10^(-9.93) = color(red)(1.2 xx 10^-10 M