i) Arrange the following metals in the order in which they displace each other from the solution of their salts.
Al, Cu, Fe, Mg and Zn
ii) Calculate the molarity of sodium carbonate in a solution prepared by dissolving 5.3 g in enough water to form 250 ml of the solution.

Explanation

According to electro chemical series electrode potentials of given elements as follows
al - -1.66 V
Cul - +0.34 V
Fe - -0.40 V
Mg - -2.37 V
Zn - -0.76 V
`:.` The order of the above metals in which they displace each other from the solution of their salts.
`Mg gt Al gt Zn gt Fe gt Cu`