If 8686 C of charge is passed through molten magnesium chloride,calculate the number of moles of Mg(l)produced.

Question

Quizplus · Accepted Answer

The balanced equation for the electrolysis of molten magnesium chloride is:
MgCl2(l) → Mg(l) + Cl2(g)

We know that 2 moles of electrons (2F) are required for the reduction of 1 mole of Mg.
Therefore, the amount of charge required to produce 1 mole of Mg is:
2 x 96485 C/mol = 192970 C/mol

Using this, we can calculate the number of moles of Mg produced as follows:
mol Mg = (8686 C) / (2 x 96485 C/mol) = 0.0450 mol

Therefore, the answer is B.

If 8686 C of Charge Is Passed Through Molten Magnesium