00:01
Okay, so we have a reaction between sodium chromate and a 2 -cr -o -4.
00:09
We're told it's an aqueous solution with an aqueous solution of zinc chloride.
00:17
And so what's going to happen in this reaction? so we write out the molecular equation.
00:22
The two can ions will swap places.
00:26
So we're going to have sodium chloride.
00:30
The n -a goes with the cl.
00:32
We have to balance out the charge.
00:35
And chlorides and sodiums are aqueous.
00:38
And then we have the zinc goes with the chromates.
00:41
We have zn -c -r -o -4.
00:44
Zinc is plus two, chromates minus two.
00:48
So that's balanced as is in terms of the formula.
00:52
And chromates are insoluble.
00:54
You need to know your solubility rules.
00:55
So that is a solid...