How to write chemical equations from word equations?
Like compounds like Sodium Chloride

You need to know the valencies of the concerned elements. Sodium has valency one, and so does chloride. Then you sort of 'cross multiply'.



That gives

Now, say, calcium fluoride. Calcium has valency 2 and fluoride valency 1.



That gives

Now iron (III) oxide. Iron valency 3, and oxygen (from oxide) 2



That gives

Is that OK?

Thanks Very much.

But what is meant by, terms like nitrate, ammonium, sulfate

Nitrate, like ammonium and sulfate are salts.

Nitrate is , ammonium is and sulfate is .