00:02
Hi there, in this question we want to know the oxidation state, or in other words the oxidation number of copper in the formula cu2o.
00:13
Well to answer that we need to know two of the rules for assigning oxidation numbers.
00:18
One of the rules we need to know is the one that says the oxidation state, or number, of oxygen is negative two.
00:38
Unless it's in a peroxide, but we don't have a peroxide here, so oxygen is going to be negative two.
00:45
The other rule we need to use is the one that says the total sum, so we add them together, of the oxidation numbers, or oxidation states, in a neutral compound is zero.
01:19
That means if we assign the oxidation state of copper, the letter x, there are two copper...