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A quantity of electrical charge that bri...

A quantity of electrical charge that brigns about the depositiion of `4.5g Al` from `Al^(3+)` at the cathode will also produce the following volume `(STP)` of `H_(2)(g)` from `H^(o+)` at the cathode.

A

`44.8L`

B

`22.4L`

C

`11.2L`

D

`5.6L`

Text Solution

Verified by Experts

The correct Answer is:
d
`2H^(o+)+2e^(-) rarr H_(2)`
`Al^(3+)+3e^(-) rarr Al` ,brgt `(W(H_(2)))/(W(Al))=(Eq(H_(2)))/(Eq(Al))=(1)/(9)`
`W(H_(2))=4.5xx(1)/(9)=0.5g=(1)/(4)mol H_(2)`
`=5.6L H_(2) at STP`
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