Question

the formula of calcium oxide is CaO. What is the formula of the ionic compound containing calium abd sulfate ions

Answer 1

`CaS`

Step-by-step explanation:

Hello!

In this case, since calcium's oxidation state when forming ionic bonds is +2 and sulfur's oxidation state when bonding those bonds is -2, for the required formula we write:

`Ca^(2+)S^(2-)`

Now, since they have the same charge number, we infer the ionic compound formed when they bond is calcium sulfide:

`CaS`

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