electrochemistry 2

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A lead storage cell when charged causes the formayion of H₂SO₄ and its cocentration is increased.In a battery having 1L electrolyte, contains 27by weight of H₂S0₄[density=1.13g/ml].On charging ,the sulphuric acid cocentration became 34.8% by weight.How many faraday`s were supplied to the battery for charging?

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skygirl ·2009-01-01 19:31:51

hey this very easy..

first find the no. of moles initially n1 : 27X1.13X1000/ 100X98 (98=mol.wt. of h2so4)

then find the no. of moles finally n2: 34.8X1.13X1000/ 100X98

now H2 liberated = n1-n2 =Î”n (say)

no of equi = Î”n X n-factor = Î”n (n factor is 1 here)

we know, 1 equi corresponds to 1F
=> 2 Î”n .................... Î”n F :)

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