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Write the cell reaction and calculate th...

Write the cell reaction and calculate the standard potentiar of the cell.
`Ni_((s))|Ni^(2+)(1M)||Cl^(-)(1M)|Cl_(2)(g,1"atm")|Pt`
`E_(Cl_(2))^(0)=1.36V and E_(Ni)^(0)=-0.25V`

Text Solution

Verified by Experts

`E_(Cl_(2))^(0)=1.36V and E_(Ni^(2+)//Nio)=-0.25V,`
`E_("Cell")^(0)=?`
`Ni_((s))|Ni^(2+)(1M)||Cl^(-)(1M)|Cl_(2_((g)))("1 atm")Pt`
`{:(,"AT LHE "Ni_((s))to Ni_((aq))^(2+)+2e^(-)("Oxidation at cathode")),(,ul (At RHE((1)/(2)Cl_(2_(g))+e^(-) to Cl_((aq))^(-))xx2("Reduction at cathode"))),(,Ni_((s))+Cl_(2_((g))) to Ni_((aq))^(2+)+2Cl_((aq))^(-)("Overall cell reaction")):}
The standard emf is given by:
`E_("cell")^(@)=E_("cathode")^(@)-E_("anode")^(0)`
`E_(Cl_(2)//(Cl))^(0)-E_(Ni^(2+)//Ni)^(0)`
`=1.36+0.25=0.61V`
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