00:01
All right, so if we take solid copper, cu, the s in parentheses, means solid, plus sulfur as is solid, becomes copper one sulfide.
00:15
The one means the charge on the copper is plus one.
00:21
Sulfide is minus two.
00:23
So we need two plus ones for the copper, just to show you here the charges, plus one for copper, sulfide is minus 2, and the whole thing has to have a charge of 0.
00:36
So 1 plus 1 minus 2 is 0.
00:39
All right.
00:40
That's how i get co2s as a solid.
00:46
Now what i'm going to do is i'm going to erase this because you don't show that in the balance formula.
00:51
But i wanted to show you how i got the 2 after the cu.
00:56
And now we have to balance it.
00:57
Two coppers on the right.
00:59
So i need two coppers on.
01:02
The left to balance that out.
01:05
Now if we have a solid iron three oxide, that three means the charge is plus three.
01:14
Oxygen is minus two.
01:16
So i can use two irons to balance out the charge and that reacts with hydrogen gas.
01:24
Hydrogen gas is h2, it's diatomic.
01:28
That forms solid iron, which is just fe, plus water.
01:36
We can assume at this point it's at room temperature it's a liquid right and so let's go ahead and try to balance this out so we've got two irons on the left so let's get two irons on the right we have three oxygens on the left so let's get three oxygens on the right we have three times two hydrogens or six hydrogens on the right we need six on the left three times two is six to balance that equation.
02:06
And then we have sulfur dioxide, dye is 2, so that's why it's so2.
02:13
Oxygen gas is diatomic.
02:16
It comes as o2 in nature.
02:19
And that forms sulfur trioxide, tri is three, gas.
02:26
And now we have to balance this out.
02:27
So if you notice, we have two oxygens on the left, three on the right.
02:32
The least common multiple between two and three.
02:35
Three is six.
02:36
So let's try to get six oxygens by putting a two here.
02:39
Two times three is six.
02:41
Three times two is six...