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 ?

Chromium metal can be plated out from an acidic solution containing `C

1.	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 ?
Answer» `6XX96500` coulombs deposite `Cr=(52xx24000)/(6xx 96500 )g = 2.1553 g ` (ii) 52 g of Cr is deposit by electricity`=6xx 96500 C` 1.5 g required electricity `=(6xx 96500)/(52)xx1.5 C = 16071 C` Time for which the current is required to be passed`=(16071.9C)/(12.5 A)=1336 S`

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(i) Arrange the following compounds in an increasing order of basic strength : `C_(6)H_(5)NH_(2), C_(6)H_(5)N(CN_(3))_(2), (C_(2)H_(5))_(2)NH and CH_(3)NH_(2)` (ii) Arrange the following compounds in a decreasing order of `pK_(b)` values: `C_(2)H_(5)NH_(2), C_(6)H_(5)NHCH_(3), (C_(2)H_(5))_(2) NH and C_(6)H_(5)NH_(2)`
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