Redox Reactions And Electrochemistry Ques 196
Question: The cell reaction of a cell is $ M{g_{(s)}}+C{u^{2+}}(aq)\to C{u_{(s)}}+M{g^{2+}}(aq) $ If the standard reduction potentials of $ Mg $ and $ Cu $ are $ -,2.37 $ and $ +,0.34,V $ respectively. The emf of the cell is [EAMCET 1995; JIPMER (Med.) 2001; AFMC 2002; CBSE PMT 2002]
Options:
A) 2.03 V
B) - 2.03 V
C) + 2.71 V
D) - 2.71 V
Show Answer
Answer:
Correct Answer: C
Solution:
$ E_{cell}^{o}=E_{Cathode}^{o}-E_{Anode}^{o} $ $ =0.34-(-,2.37)=+,2.71V $ .
