Question

The value of the reaction quotient $Q$ for the cell
$Z(s)\left|Z{n}^{2+}(0.01M)\right|\left|A{g}^{\oplus }(1.25M)\right|Ag(s)$ is

• A. 156
• B. 125
• C. $1.25\times 10^{-2}$
• D. $64\times 10^{-3}$

Answer 1

Answer: (D)

Write cell reaction:
$Zn(s)+2A{g}^{\oplus }(1.25M)\to Z{n}^{2+}(0.01M)+2Ag(s)$
$Q=\frac{\left[Z{n}^{2+}\right]}{\left[A{g}^{\oplus }\right]}=\frac{0.01}{(1.25{)}^2}=64\times 10^{-3}$