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Calculate e.m.f. of half cells given bel...

Calculate `e.m.f.` of half cells given below :
(a) `{:(Pt_(2)),(4atm):}|{:(H_(2)SO_(4)),(0.02 M):} E_(OP)^(@) = 0 V`
(b) `{:Fe:}|{:(FeSO_(4)),(0.2 M):} E_(OP)^(@) = 0.44 V`
(c) `{:(Pt_(Cl_(2))),(10atm):}|{:(HCl),(0.02 M):} E_(OP)^(@) = -1.36 V`

Text Solution

Verified by Experts

`2Cl^- toCl_2+2e`
`:.E_(OP)=E_(OP)^0-(0.059)/2log(P_(cl_2))/([Cl^-]^2)`
`-1.36-(0.059)/2log(10)/((0.02)^2)`
`E_(OP_(Cl//Cl_2))=-1.49` volt
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