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-ate and -ide

So the school gave us some work over the summer and I don't understand one of the check-list things.

It says:

Do you understand how the endings -ate and -ide tell you which elements are present in a compound.

Also how do you work out the formula for aluminium nitride
and Iron(3)sulphide.
I'm not sure what the charges are for nitride and the sulphide?

Thanks in advance :smile:
Reply 1
Avatar for Aph
Aph
22
Ide mwans its on its own
Ate I think means it also has hydrogen or oxygen combined as well

Posted from TSR Mobile
-ide and -ate are easy.
There are too many chemical elements which have many oxidation states. Typically, The highest (+) oxidation state has ending (ate), and lowest has ending (ide)

For example: Sulfur has 3 different types of oxidation states. -2, +4 and +6.
When Sulfur uses its -2 oxidation state, we call it Sulfide. Na2S sodium sulfide.
When Sulfur uses its +4 oxidation state, we call it Sulfite. Na2SO3 sodium sulfite
When Sulfur uses its +6 oxidation state, we call it Sulfate. Na2SO4 sodium sulfate.

and by the way, Iron (III) sulfide is: Fe2S3
aluminium nitride is: AlN
As I said ide has the lowest (o.s) Sulphide- (-2), nitride - (-3)

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