Question

Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.

(a) Write equations to show how X and Y form ions?

(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.

(c) If the compound formed between X and Y is melted and an electric current passed through the molten compound, the element X will be obtained at the ___ and Y at the ___ of the electrolytic cell.

(Provide the missing words).

Answer 1

(a) $X⟶X^{2+}+2e^{-}$
$Y+3e^{-}⟶Y^{3-}$

(b) $Y_2+3X⟶X_3{Y}_2$

(c) Cathode, Anode