00:01
So this question here asks us to rate the acidity or basicity and compare it of these five compounds.
00:07
They're all salts.
00:10
And so we're going to just take a quick run through each one, and so we can get an idea of what side of the table it should go on.
00:17
And so this first one here, alcl3, this will associate into aluminum 3 plus and cl minus.
00:27
Cl minus is the conjugate base of hcl, and so this is going to be neutral.
00:30
Ion but al3 plus is just like a textbook lewis acid and so it's a small highly charged ion and so what we're gonna expect is we're gonna expect this to be somewhat acidic next one sodium cyanide the sodium ion won't do anything to this to change the ph but cn minus is the conjugate base of hcn which is a weak acid and so we expect some basicity to cn minus more to see just how much later but we're expecting it just a little bit basic kohh very strong base so very basic we probably expect it to be right on the right on the most basic and cesium uh or per chlorate um this is an interesting one this is actually going to be exactly neutral because cesium just like sodium it's a neutral ion and c l .0 .4 minus is a conjugate base of h clll4 a very strong acid and so clo4 -mius has negligible basisity.
01:33
So this is neutral, so we're going to expect it right here in the middle.
01:36
And sodium fluoride, sodium again, neutral ion.
01:40
Fluoride is the conjugate base of fhf, which is a weak acid.
01:44
So what we're going to see is this kind of a very similar situation as with hcn.
01:50
One of them is going to be more based on the other.
01:52
We'll have to look at k -a values to figure that out.
01:54
So looking at this, we only have one acidic one.
01:57
So that's al -c -l -3...