Aluminum metal is formed by the electrolysis of Al₂O₃ in molten cryolite. How many grams of Al are produced when 6.50 * 10³ C pass through the cell

Question

Quizplus · Accepted Answer

The first step is to calculate the amount of moles of electrons that pass through the cell:

6.50 C × 1 mol e⁻/ 96500 C = 6.72 × 10⁻⁵ mol e⁻

Since the electrolysis of AlSbO₄ produces 3 moles of electrons for every mole of Al produced, the moles of Al produced can be calculated by dividing the moles of electrons by 3:

6.72 × 10⁻⁵ mol e⁻ ÷ 3 = 2.24 × 10⁻⁵ mol Al

Finally, the mass of Al produced can be calculated by multiplying the moles of Al produced by its molar mass:

2.24 × 10⁻⁵ mol Al × 26.98 g/mol Al = 0.606 g Al

Therefore, the correct answer is B.

Aluminum Metal Is Formed by the Electrolysis of Al2O3 in Molten

Aluminum Metal Is Formed by the Electrolysis of Al₂O₃ in Molten