InterviewSolution
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InterviewSolution
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`a.` In the following reactions, what weight of substance would be liberated if `1F` of electricity were passed through the cell `:` `i. Cu^(2+)+2e^(-) rarr Cu` `ii. Al^(3+)+3e^(-) rarr Al` `iii. 2Cl^(c-) rarr Cl_(2)+2e^(-)` `iv. Ag^(o+)+e^(-) rarr Ag` `b.` In the series of cathodes `//` anodes given above, how many coulombs are needed to produce `1 g` of each ofA. `Cu`B. `Al`C. `Cl_(2)`D. `Ag` |
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Answer» Correct Answer - `a. i. 31.75g" "ii. 9g" "iii. 35.5g" "iv. 108g ` `b.` `i. 3039C" "ii. 10722.2C" "iii. 2718.3C" "iv. 893.5C` `i. Cu^(2+)+2e^(-) rarr Cu` `[{:(2e^(-),2F-=1 mol of Cu,,=,63.5g),(1F,(63.5)/(2)=31.75g,,,):}]` `ii. Al^(3+)+3e^(-) rarr Al ` `[{:(3e^(-),3F-=1 mol of Al,,=,27g),(1F,(27)/(3)=9.0g,,,):}]` `iii. 2Cl^(c-) rarr Cl_(2)+2e^(-)` `[{:(2e^(-),2F-=1 mol of Cl_(2),,=,71.0g),(1F,(71.0)/(2)=35.5g,,,):}]` `iv. Ag^(o+)+e^(-) rarr Ag` `[1e^(-)=1F=1mol` of `Ag =108g]` `b.` `i. Cuimplies((1)/(63.5))xx(96500xx2C)=3039.5C` `ii. Alimplies((1)/(27))xx(96500xx3C)=10722.2C` `iii. Cl_(2)implies((1)/(71))xx(96500xx2C)=2718.3C` `iv. Agimplies((1)/(108))xx(96500xx1C)=893.5C` |
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