00:01
In this video, we want to write a complete balanced chemical equation from the given word equation.
00:05
So we're told that we have aqueous zinc nitrate.
00:08
That's composed of zinc and nitrate.
00:11
Zinc is 2 plus and nitrate is no3 minus, which means that the formula, we need two of the negatives to balance out that positives charge.
00:21
We put it in parentheses since it's a polyatomic ion.
00:23
So we have zn, no3, parentheses, is 2, and that's aqueous.
00:27
And that reacts with aqueous ammonium phosphate.
00:31
So ammonium is nh4 plus, and phosphate is po4 with a minus 3 charge.
00:37
So we need three of the positives, again, putting it in parentheses because it's a polyatomic ion.
00:42
So it subscriptoplies overall in one of the anions, and that's also aqueous.
00:48
We'll put a plus sign in between them.
00:50
So now we have two ionic compounds reacting, so that's going to be a double replacement reaction.
00:56
And to obtain the products for something like this, you interchange the cations or the anions.
01:02
I always just do the cations because they come first.
01:05
So on the product side, now we'll have nh4 plus reacting with no3 minus and then zn2 plus reacting with po43 minus.
01:18
We can draw our arrow...