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Q. An electrochemical cell is shown below $Pt$,
$H _{2}(1\, atm )| HCl (0.1 M)| CH _{3} COOH (0.1 \,M) \mid H _{2}(1 \,atm ), Pt$
The EMF of the cell will not be zero, because

AIPMTAIPMT 1995Electrochemistry

Solution:

The EMF of the cell will not be zero because concentration of $H^+ $ ions in two electrolytic solutions is different. Mean $HCl$ is strong acid where, acetic acid is weak acid and gives different $pH$.