00:01
Which of these two compounds is more acidic, which is the stronger acid? so we're considering this carbon hydrogen bond.
00:10
It's the same as this one or this one.
00:11
When we're talking about acids and their strengths, we are looking for a hydrogen to remove, to deprotonate.
00:19
So you can either go about this by memorizing pcas or looking up a pkk and a table, and they're given to you in this instance.
00:27
Or you can also look at the conjugate base and determine which one is more stable.
00:35
So let's start with the pca argument.
00:38
The lower the pca, the more acidic it is.
00:42
It's just a general trend.
00:44
The lower the pca, the more acidic it is.
00:46
So already we know that ethanol is more acidic than propane.
00:50
Let us remove both hydrogens and look at the conjugate bases to see why the alcohol is more acidic than an alkan chain.
01:03
So if we draw the conjugate base for both of these compounds, this ends up being ch2 with a negative charge on carbon.
01:13
Here we're removing this hydrogen on oxygen, and we get to this compound.
01:23
Which is more stable? well, the alkaliide is more stable because oxygen has a greater electronegativity than carbon.
01:32
Therefore, it's more capable of handling the negative charge put on it.
01:36
The extra electron density is able to hold closer to itself than carbon is...