Question

How many coulombs of electricity are required to produce 4.5 g of aluminium from molten aluminium chloride (Molar mass of aluminium is 27g/mole

Answer 1

Explanation:

48250 coulombs

Electricity required to produce 4.5 grams of aluminium from molten aluminium chloride is 48250 coulombs. According to faraday first law mass of substance deposited at their electrodes is directly propotional to the charge flow through it.

Answer 2

32167 Coloumb of electricity is required to produce 4.5 g of aluminium from molten aluminium chloride

Explanation:

$Q=I\times t$

where Q= quantity of electricity in coloumbs

I = current in amperes

t= time in seconds

$AlCl_3\rightarrow Al^{3+}+3Cl^{-}$

$Al^{3+}+3e^-\rightarrow Al$

$96500\times 3=193000$ Coloumb of electricity deposits 1 mole of aluminium

27 g of aluminium is deposited by passing = 193000 Coloumb of electricity

4.5 of aluminium is deposited by passing = Coloumb of electricity

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