00:01
So for this problem, we want to write a balanced chemical equation for the reaction between aluminum and oxygen to produce aluminum oxide.
00:11
So let's first start out by drawing the skeletal equation.
00:16
So we have aluminum, which is a -l, we'll just call this a solid, plus oxygen.
00:23
And so anytime you have oxygen, let's say oxygen gas, it's always going to be written as o2.
00:29
And this is going to produce aluminum oxide.
00:37
So aluminum has a charge of plus three, and oxygen has a charge of negative 2.
00:42
So in order for this to have an overall net formal charge of zero, you have to have two aluminum for every three oxygens.
00:53
And that way your aluminum is going to have, your two aluminum has an overall charge of positive 6, and your three oxygens has an overall charge of negative 6.
01:02
Which balances out.
01:05
So this is going to be a solid.
01:09
So now we want to balance this equation.
01:14
So let's go through and count how many atoms we have...
