## Kw and water

Dakota_Campbell_1C
Posts: 39
Joined: Thu Sep 27, 2018 11:15 pm

### Kw and water

In lecture we did the calculations for Kw, I am unsure what the significance of this constant is. I thought that water was not an important part of equilibrium, why do we calculate a constant for it and what is it used for?

Aidan Ryan 1B
Posts: 51
Joined: Thu Sep 27, 2018 11:17 pm

### Re: Kw and water

It is the addition of the Ka and Kb. It is used to solve for these.

Parth Mungra
Posts: 55
Joined: Thu Sep 27, 2018 11:28 pm

### Re: Kw and water

Kw is just the Equilibrium constant for water, which undergoes autoprotolysis, a natural reaction (very few water molecules do this). By doing this, there is a concentration of hydroxide and hydronium ions. If you take the Kc of this reaction, you find Kw, which is 10^-14 at 25 degrees Celsius