How many grams of Ca metal are produced by the electrolysis of molten CaBr₂ using a current of 30.0 amp for 8.0 hours?

Question

Quizplus · Accepted Answer

The correct answer is D.The number of moles of electrons passed through the cell is:$$n = \frac{It}{nF} = \frac{(30.0 	ext{ A})(8.0 	ext{ h})(3600 	ext{ s/h})}{2(96500 	ext{ C/mol})} = 1.44 	ext{ mol}$$The number of moles of Ca produced is:$$n_{Ca} = \frac{1.44 	ext{ mol}}{2} = 0.72 	ext{ mol}$$The mass of Ca produced is:$$m_{Ca} = n_{Ca} 	imes M_{Ca} = (0.72 	ext{ mol})(40.08 	ext{ g/mol}) = 28.9 	ext{ g}$$

How Many Grams of Ca Metal Are Produced by the Electrolysis