Question

Explain why magnesium chloride must be molten or dissolved in water to be electrolysed

Answer 1

Answer:

Ionic compounds need to be molten or in solution for electrolysis to work. This is because the charged particles that make them up (ions) need to be free to move to the electrodes. When zinc chloride is melted, the ions which make it up become free to move.

Answer 2

Answer:

here is your answer

Explanation:

MgCl2 has to be heated until molten in order for it to conduct electricity. When molten you have Mg2+ and 2Cl- ions. Then electrolysis separates the elements.

Mg2+ + 2e- =>Mg(s)

2Cl- =>Cl2(gas)

The Mg2+ is reduced at the cathode (-) and the Cl- is oxidized at the anode(+).

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