00:01
The key to answering this question is to have your strong acids and your strong bases memorized.
00:07
If we have an anion from a strong acid, then the anion does not behave as a significant acid or a base.
00:17
If we have a cation from a strong base, then the cation does not behave as a significant acid or base.
00:27
So here are a list of our strong acids and our strong bases.
00:33
And then some of the other alkaline earth metals.
00:56
So in looking at our options, we have a salt, the first one, lithium bromide, that contains a cation of a strong base and an ion of a strong acid.
01:12
So neither one of these ions affect the ph of the solution.
01:16
So this would be neutral.
01:20
The next one is nh4, c -l -o -4.
01:26
I forgot one strong acid hclo4.
01:37
So this has an anion from a strong acid, so this doesn't behave as a significant base.
01:46
And then we have ammonium that came from the weak base ammonia.
01:52
So ammonium itself is a weak acid.
01:56
So this would be an acidic salt.
01:59
Then we have sodium sulfide...