In a galvanic cell, the following reaction:
`Zn(s)+2Ag^(2+)(aq)toZn^(2+)(aq)+2Ag(s),E_(cell)^(@)=1.50V`
(a) Is the direction of flow of electrons from zinc to silver or silver to zinc?
(b) How will the concentration of `Zn^(2+)` ions and `Ag^(+)` ions be affected when the cell functions?

Explanation

(a) Zn loses electrons while `Ag^(+)` ions in `Ag//Ag^(+)` electrons gais electrons. Hence, flow of electrons is from Z to Ag. ltBrgt (bgt Zn changes into `Zn^(2+)` ions. Hence, concentration of `Zn^(2+)` ions increases. `Ag^(+)` ions change into Ag. Hence, concentration of `Ag^(+)` ions keeps on decreasing.