Chemistry
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)
Electrolysis
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Answer
(a) X ⟶ X2+ + 2e-
Y + 3e- ⟶ Y3-
(b) 3X + Y2 ⟶ X3Y2
(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 cathode and Y at the anode of the electrolytic cell.
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