Question

For the cell $M/M^{+}||X^{-}/X,E_{M^{+}/M}^{\circ }=0.44$ and $E_{X/X^{-}}^{\circ }=0.33V$. From the data it can be deduced that $M+X\to M^{+}+X^{-}$ is spontaneous.

• A. $M+X\to M^{+}+X^{-}$ is spontaneous
• B. $E_{Cell}=0.77V$
• C. $E_{Cell}=-0.77V$
• D. None

Answer 1

Answer: (A)

$M+X\to M^{+}+X^{-}$ is spontaneous

For a reaction to be spantaneous,

$E_{re}$ should be positive

Hence ${E^0}_{M^{+}/M}{{-E}^0}_{X/X^{-}}=0.44-0.33=0.11$

As $E_{M^{+}/X^{-}}$ is positive. We can conclude that $M^{+}+X^{-}\to M^{+}+X^{-}$ is Spantaneous as $E_{cell}$ is $0.11V$.