00:01
So for h .a.
00:03
Our acid, the acid dissociation constant that we're looking for, ka, is describing this reaction where ha reacts with water.
00:13
It acts as an acid.
00:14
In other words, it gives up this h -plus.
00:16
So we get h -3 -0 -plus and then the contrary base, a -minus.
00:20
You see, this hydrogen went over here.
00:23
And so if we perform an ice table on this, this is the same sort of ice table.
00:29
I may erase this.
00:29
This is the same sort of ice table.
00:31
You do for a simple acid -based association question, and you should be really comfortable with this, we'll get the following.
00:39
So our initial amount, we're told, is 0 .115, ignore water.
00:45
We have zero initial over here.
00:48
Changes minus x plus x plus x.
00:52
And so at equilibrium, we have the following values.
00:55
This should be comfortable to you from the equilibrium unit and just from doing cracks of problems.
01:00
And so if not, i have earlier questions that i've described...