Question

Chromium metal can be plated out from an acidic solution containing `CrO_(3)` according to the following equation `:`
`CrO_(3)(aq)+6H^(o+)+6H^(o+)(aq)+6e^(-) rarr Cr(s)+3H_(2)O`
`a.` How many grams of chromium will be plated out by `24000C` ?
`b.` How long will take to plate out `1.5g` of chromium by using `12.5 A` current ?
A. `1//13` g
B. `13//6` g
C. `4//5` g
D. `5//4` g

Answer 1

Correct Answer - B
`6 xx 96,500 C to 52 ` gm of `Cr^(+6)`
`therefore 24, 125 C = (24,125 xx 52)/(6 xx 96,500) = (13)/(6)` g