00:01
Here we're looking at a dissociation reaction.
00:06
And so we have the ph of nacn solution.
00:09
That is 12 .1.
00:10
So we can calculate the h plus, which is equal to 10 to minus ph, which is equal to 7 .9 times 10 to minus 13 molar, where kw is equal to h plus, multiplied by oh minus, which is equal to 1 .0 times 10 to minus 14.
00:30
We can solve for oh -h -minus that is equal to 0 .013 molar by rearranging the equation that we have here, because we know the k -w value.
00:42
We know the h -plus, we solve for oh -h -minus, which is 0 .0 .03 molar, where kb is equal to h -c -n.
00:52
This is the starting materials.
00:55
Ohh -minus divided by cn minus...