What is the mass (in g) of Ca (40.1 g/mol) that will theoretically be produced?

Question

A constant current of 10 amps is passed through an electrolytic cell containing molten CaCI2 for 12 hours.

Cathode: Ca2+ + 2e- --> Ca

Anode: 2Cl- --> Cl2 + 2e-

Answer 1

It = Q --> moles of electrons --> moles of product --> grams of product

It = 10 coul/s * 1hr(3600 s/hour)

Look up Faradays constant: that gives you charge per mole for electrons or work it out by multiplying the charge on one electron times Avogadro's number.

For every 2 moles of electrons you get one mole of CaCl₂

You know g/mole CaCl₂

Coulombs --> grams of CaCl₂ cancelling units and multiplying and dividing appropriately.