00:01
Okay, so we have the weak acid, the concentration is 0 .15 mole.
00:06
So we don't know what's the acid, but we can write down as ha as a formula.
00:14
And it says for this acid, the ph is 2 .53.
00:20
So from here, we know that the concentration of the proton is equal to 10 to minus 2 .53.
00:31
And we want to know the ka for such an acid.
00:35
So first we can write down the dissolution reaction.
00:40
The ha, we dissociate into proton and anions, right? or cations.
00:56
So we can draw the ice table.
01:00
Initially, we have 0 .15 moles of the ha, but we don't have any proton or a -minus cations.
01:09
And we undergo some sort of change and produce the same amount of the proton and a -minus...