00:01
So for the first one, we need to get the most acidic proton.
00:06
And we can see that it must be the one in the oh group.
00:12
So the reason is because you see that this one is attached right to the benzene ring.
00:18
And that makes it highly acidic because of the fact that once the proton is removed, the resonance stabilization in the conjugate base makes the resulting conjugate base very stable.
00:30
And so the more stable the conjugate base, the more acidic, the acid.
00:38
And the pca should be about 10.
00:50
So for the next one, we're going to be looking at the hydrogen here and this methyl group.
01:06
So it's because this methyl group is attached directly to this carbony group, which is highly electron withdrawing.
01:13
So it's going to withdraw the electrons towards it.
01:17
And that will make it easier for the hydrogen to leave.
01:21
And so that's why it's going to cause it to be highly acidic.
01:29
And we have to compare the carbonyl with the amine hydrogen, and carbonyl should be stronger than the amine because this pca is lower.
01:45
So therefore, our pca of the carbonyl should be estimated to be about 20.
01:53
So for the next one, we have carboxylic acid versus.
01:56
The thiel.
01:58
So in this case, our carboxylic acid is stronger because of the fact that the oxygen is a very strong electron withdrawing group.
02:09
And then the hydrogen is going to leave much more easily because of that.
02:16
So then the pqi is going to be between four and five.
02:22
While the cl also withdraws electrons away from the hydrogen, causing it to be easier to leave, it is much more.
02:30
The effect is much more strong with the carboxylic acid group and the two oxygons, which are both highly electronegative atoms that are pulling the electrons away from this oh bond.
02:47
For the next one, the hydrogen is here, and we have a triple bond here, which is highly electron withdrawing, and a very highly electronegative atom, which will withdraw the electrons towards it, making it easier for this hydrogen to leave.
03:09
And because of that triple bond, it's stronger than the electron withdrawing effect with just the nh bond.
03:16
And then the pca should be about 2 .5.
03:23
So then let's move on to the next one.
03:27
We could see here that it must be this hydrogen...