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Consider the reaction, Cr(2) O(7) ^(2-...

Consider the reaction,
`Cr_(2) O_(7) ^(2-) + 14 H^(+) + 6e^(-) rarr 2Cr^(3+) + 7 H_(2) O`
What is the quantity of electricity in coulombs needed to reduce 1 mole of `Cr_(2)O_(7)^(2-)` ?

Text Solution

Verified by Experts

In the above reaction, one `Cr_(2)O_(7)^(2-)` ion requires 6 electrons for reduction, Therefore 1 mole of `Cr_(2)O_(7)^(2-)` ions require 6F, i.e. `6 xx 96500 C = 579000C` of electricity for reduction.
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