Redox Reactions And Electrochemistry Ques 143
Question: $ EMF $ of cell $ Ni|N{i^{2+}},(1.0,M)||A{u^{3+}},(1.0,M)|Au $ (Where $ E^{o} $ for $ N{i^{2+}}|Ni $ is $ -0.25V;E^{o} $ for $ A{u^{+3,}},|Au $ is $ 1.50V) $ is [MP PET 1993; MP PMT 2000]
Options:
A) + 1.25 V
B) $ -,1.75V $
C) + 1.75 V
D) + 4.0 V
Show Answer
Answer:
Correct Answer: C
Solution:
$ {E_{cell}}=E_{A{u^{3+}}/Au}^{o}-E_{N{i^{2+}}/Ni}^{o} $ $ =1.50-(-0.25)=1.75 $ V.
