Redox Reactions And Electrochemistry Ques 56
Question: The chemical reaction, $ 2AgCl(s)+H_2(g)\ \to $ $ 2HCl(aq)+2Ag(s) $ taking place in a galvanic cell is represented by the notation [AIIMS 2005]
Options:
A) $ Pt|H_2(g),1\text{bar }|\text{ 1}M\ KCl(aq)|AgCl(s)|Ag(s) $
B) $ Pt(s)|H_2(g),\ 1\text{bar }|\ 1M\ HCl(aq)||1M\ A{g^{+}}(aq)|Ag(s) $
C) $ Pt(s)|H_2(g),\ 1\text{bar }|\ 1M\ HCl(aq)|AgCl(s)|Ag(s) $
D) $ Pt(s)|H_2(g),\ 1\text{bar }|\ 1M\ HCl(aq)|Ag(s)|AgCl(s) $
Show Answer
Answer:
Correct Answer: B
Solution:
2AgCl(s) + H2(g) $\rightarrow$ 2HCl(aq.) + 2Ag(s) The activities of solids and liquids are takes as unity and at low concentrations, the activity of a solute is approximated to its molarity. Th cell reaction will be Pt(s) | H2(g), 1 bar | H+(aq) 1 M | AgCl(aq) 1 M | Ag(s)
