I think I know what I'm doing but I'm confused.
Basically I've been given this;
K= [NH4+(aq)] X [OH-(aq)] / [NH3(aq)] X [H2O(l)]
I've been given the values;
K= 3.19x10^-7
NH3(aq)= 1.00x10^-2 mol dm^-3
H2O(l)= 55.4 mol dm^-3
So I need to find the concentration of OH-. I know I have to rearrange the equation BUT since I have already been given a value for K what do I do with the H2O value? I thought I had to move that over to the left. Do I add it to K or multiply it to K?! Or am I way off?!
Any handy pointers are greatly appreciated!
Cheers
Pete.
