How.Many minutes will it take to plate out 5 g of cr from a cr2(so4)3 solution using a current of 1.50 a?
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Answer:
t = 309.29 minutes
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Given
How.Many minutes will it take to plate out 5 g of cr from a cr2(so4)3 solution using a current of 1.50 a?
ANSWER
Current = 1.5 A
Molar mass of Cr is 52 g/mol
One mole is 52 g of Cr deposited by 3 F = 289500 C
So 5.0 g of Cr will be deposited = 289500 / 52 x 5 = 27836.54 C
Now Q = I x t
t = Q / I
t = 27836.54 / 1.5
t = 18557.69 seconds
t = 18557.69 / 60
t = 309.29 minutes
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