First slide

Faraday's Laws

Question

Beryllium occurs naturally in the form of beryl. The metal is produced from its ore by electrolysis after the ore has been converted to the oxide and then to the chloride. How many grams of Be(s) is deposited from a BeCl₂ solution by a current of 5.0 A that flows for 1.0 h? (Atomic weight : Be = 9)

Moderate

A

0.840
B

1.68
C

1.42
D

1.08

Solution

$w = \frac{9}{2} \times \frac{5 \times 1 \times 60 \times 60}{96, 500} \approx 0 .840 g$

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