Redox Reactions And Electrochemistry Ques 192
Question: What is the potential of a cell containing two hydrogen electrodes the negative one in contact with $ {10^{-8}} $ M $ {H^{+}} $ and positive one in contact with 0.025 M $ {H^{+}} $ [MP PMT 2000]
Options:
A) 0.18 V
B) 0.28 V
C) 0.38 V
D) 0.48 V
Show Answer
Answer:
Correct Answer: C
Solution:
$ \frac{1}{2}H_2\to {H^{+}}({10^{-8}}M)+{e^{-}}(oxidation) $ $ {H^{+}}(0.025,M)+{e^{-}}\to \frac{1}{2}H_2(reduction) $ Cell reaction is : $ {H^{+}}(0.025,M)\to {H^{+}}({10^{-8}},M) $ ; $ {E_{cell}}=0.38V $ .
