What mass of beryllium metal is produced when molten BeF2 is electrolyzed by a current of...

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Question

What mass of beryllium metal is produced when molten BeF₂ is electrolyzed by a current of 6.83 A for 17.7 h?

science chemistry

Answer 1

Answer #1

Be⁺² + 2e^- ----------> Be

first calculate chrge in columbs

charge in columb = current in A x time in s

Charge = 6.83 x 17.7 x 60 x 60

Charge = 435207.6 C

according to balanced reaction

2 x 96487 C charge gives 9.0 g Be

435207.6 C charge gives 435207.6 x 9.0 / 2 x 96487 = 20.30 g Be

mass of Be metal produced = 20.30 g

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Answer 2

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