how much electricity in terms of faraday's required to produce 20g of calcium from molten cacl2
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The balance reaction will
The charge on Ca in CaCl2
Ca + 2Cl = 0
Cl has –1 charge so that
Ca + 2(–1) = 0
Ca = 2
We have to get 2o g Ca from Ca2+
Number of required moles = mass / molar mass
Molar mass of Ca is 40 g/mol and required mass of Ca is 20 g
Hence number of moles = 20/40 = 0.5 mol
Electricity required to produce 1 mol of calcium = 2 F
The electricity required to produce 0.5 mol of calcium
= 0.5 × 2 F
= 1 F
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