00:04
Here we have to identify each species as a base or as an acid.
00:11
Now for the first one, hs minus accepts a proton and produces h2s.
00:19
So it is the proton acceptor, so it acts as a base.
00:26
And here h2o donates a proton and produces oh minus.
00:32
So it is the proton donor.
00:33
So it acts as an acid.
00:38
In the reverse reaction, h2s donates a proton and produces hs minus.
00:45
So it is the proton donor, so it is the acid.
00:48
And oh -h -minus accepts a proton and produces water.
00:53
So o -h -minus is the base, proton -acceptor, so it is the base.
00:57
For the next one, here h -co -3 -1 accepts the proton and produces h -2 -2.
01:04
To co3.
01:05
So proton acceptor, so it is the base.
01:08
H2 -so -4 donates a proton and produces h -s -o -4 -minus.
01:13
So it is the proton donor, so it is the acid.
01:17
Here in the reverse reaction, h -s -o -4 -1 accepts a proton and produces h -2 -s -o -4.
01:24
So it is the acid, sorry, it is the base proton acceptor...