Q.

Calculate emf of a cell Ag(s) /Ag+(1M) /Mg+2(1M) / Mg(s) and also predict the spontaneity of cell reaction.EAg+/Ag0= +0.8V;  EMg+2/Mgo= −2.37V

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Detailed Solution

LHE ….AnodeRHE ….CathodeBoth the values given are SRP values∴ Ecello = Eca thodeo−Eanodeo            = (–2.37V)–(+0.8V)           = –3.17V∴Ecell0 is negative, the cell reaction is non-spontaneous
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