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How many moles of mercury will be produc...

How many moles of mercury will be produced by electrolysing 1.0 M `Hg(NO_(3))_(2)` solution by a current of 2.0 A when passed for 3 hours ?

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The correct Answer is:
0.112 mole
`Hg^(2+)+2e^(-)toHg,Q=2Axx(3xx3600s)=21600C`
`2F=2xx96500C` produce `Hg=1` mole
`therefore21600`C will produce Hg `=(1)/(2xx96500)xx21600`mole=0.112 mole
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