00:02
Hey there.
00:03
This question is asking us about naming ionic compounds.
00:13
When we name an ionic compound, we write the name of the metal first, followed by the name of the non -metal.
00:20
And we change the ending of the non -metal to ide.
00:26
However, if the metal has more than one oxidation state, so if it has more than one possible oxidation state or more than one possible charge, you might think of it that way, we need to add a roman numeral to tell the reader the charge of the metal.
01:07
For example, let's look at a couple of examples here.
01:11
We have c -u -c -l as a compound and c -u -cl -2 as a compound.
01:17
So they both contain copper and they both contain chloride.
01:22
If we did not use a roman numeral, both of these would have the same name.
01:29
And how would the reader know which was which? these are two different compounds.
01:33
They react differently.
01:34
Actually, one is blue and one is more of a blue -green or greenish -cove.
01:40
So there are two different compounds.
01:44
So we need to be able to tell them apart...