For the electrochemical cell, `M|M^(+) ||X^(-)|X`, `E_(M^(+)//M)^(@) = 0.44 V` and `E_(X//X^(-))^(@) = 0.33 V`. From this data we can deduce that :

Options

A. `M + X to M^(+) + X^(-)` is the spontaneous reaction
B. `M^(+) + X^(-)to M + X` is the spontaneous reaction
C. `E_(cell) = 0.77` V
D. `E_(cell) = -0.77` V

Answer

B

Explanation

`E_(cell)^(@) = E_(RHS)^(@) - E_(LHS)^(@) = 0.33 - 0.44 =-0.11 V`
`therefore` Reaction `M^(+) + X^(-) to M + X` is a spontaneous .