Question

what is the formula to calculate the mass deposited during electrolysis​

Answer 1

Answer:

If 0.1 mol of molten aluminium oxide is completely electrolysed (i) what mass of aluminium is formed and (ii) what volume of oxygen is formed (at RTP)

atomic mass Al = 27, molar volume of any gas at RTP = 24 dm3

(i) From 1 mole of Al2O3 you get 2 moles of Al

therefore from 0.1 mol of Al2O3 you get 0.2 mol of Al

mass Al = moles Al x atomic mass

mass Al = 0.2 x 27 = 0.54 g Al