# Concentration of OH in HCl

## Homework Statement

At 10 C, the concentration of OH in 1 M of HCl is approximately:

Kw=KaKb

## The Attempt at a Solution

This answer throws me off. If we assume that HCl completely dissociates, we use the [H+] from the acid in the above equation:
1x10^-14 = 1 [OH]

I get 1 x 10^-14, not 3 x 10^-15. What am I missing here? Is my book wrong? Thanks.

Thanks for the table but I still don't think I get it. Since this is for the mcat, how am I supposed to calculate the OH concentration at 10 C?

Borek
Mentor
What is the definition of Kw?

Kw is the equilibrium constant for [H+] and [OH-]. In aqueous solution, Kw remains at 10^-14.

Borek
Mentor
In aqueous solution, Kw remains at 10^-14.

Have you really seen the table? What is the Kw value at 10°C?