Question

In the electrolysis of aqueous NaCl, how many grams of Cl2 are generated by a current of 3.25 amperes flowing for 500 minutes?

Answer 1

an ampere is a Coulomb per second

there are 6.242E18 electrons in a Coulomb

moles of electrons = (6.242E18 * 3.25 * 500 * 60) / 6.02E23

it takes two electrons to generate a Cl2 molecule

find the moles of electrons
... divide by two to find the moles of Cl2

multiply by the molar mass of Cl2 to find the grams