ElectrochemistryHard

Question

Time required to deposit one millimole of aluminum metal by the passage of 9.65 amperes through aqueous solution of aluminum ion is

Options

A.30 s
B.10 s
C.30,000 s
D.10,000 s

Solution

l3+ + 3e- → Al
1mole requires = 3 × 96500 coulomb
1 millimole (10-3mol)requires
= 3 × 96500 × 10-3C
we know that, Q = i t
or t =

= 30 sec.

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