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Consider an electrochemical decomposition apparatus comprised of a strontium chloride cell, a berylium chloride cell, and a barium chloride cell (you should be able deduce the formulae for these compounds). If sufficient charge is passed through the circuit to produce 20 g of strontium in the molten strontium chloride cell, what quantity of berylium is expected in the berylium chloride cell

Sagot :

Answer:

Explanation:

Atomic weight of strontium ( Sr ) is 88 .

Atomic weight of Beryllium ( Be) is 9 .

Both are bivalent .

2 x 96500 coulomb is required to decompose 88 g of Sr .

88 g of Sr requires 2 x 96500 coulomb of charge

20 g of Sr will require   2 x 96500 x 20 / 88 coulomb of charge

coulomb of charge required = 43863.63 coulomb .

9 g of Be requires 2 x 96500 coulomb of charge

2 x 96500 coulomb of charge gives  9 g of Be

43863.63 coulomb .of charge gives 9 x 43863.63 / (2 x 96500 ) g of Be

= 2.04 g.

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