Q. An electrochemical cell is set up as follows $Pt\left( H_{2},\ 1\ atm \right)\ \left| \ 0.1\ M\ HCl\ ||0.1\ M\ acetic\ acid\ \right|$ $\left( H_{2},\ 1\ atm \right)Pt\ Emf$ of this cell will not be zero because
A) The pH of 0.1 M $HCl$ and 0.1 M acetic acid is
not the same
B) Acids used in two compartments are different
C) Emf of a cell depends on the molarities
of acids used
D) The temperature is constant
Explanation
(a)
The PH of 0.1 M $HCl$ and 0.1 M acetic acid is
not the same, because $HCl$ is a strong acid,
so its pH is more and ${CH}_{3}COOH$ is a weak acid,
so its pH is less
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.