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Question

4.5 g of aluminium is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H+ ions is solution by the same quantity of electric charge will be?


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Solution

Step 1: Given data

Weight of Aluminium =4.5g

Step 2:Calculating No. of equivalents

No.of equivalents of Aluminium deposited=4.59=0.5

No.of equivalents of H2 will also be 0.5

Step 3: Deriving Volume of Hydrogen gas

Volume of H2 at STP,

=No.ofequivalentsxEquivalentvolume=0.5x11.2=5.6L


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