(i) Predict the reaction, if any, between (a) zinc and silver nitrate solution,


#1

(i) Predict the reaction, if any, between
(a) zinc and silver nitrate solution,
(b) magnesium and iron (II) chloride solution,
© copper and magnesium sulphate solution.
Write the equations, with state symbols, for the reaction.
(ii) A lump of element X can be cut by a knife. During its reaction with water, X floats and melts. What is X? Explain.


#2

(i) (a) Zinc is more reactive than silver. It will displace silver from silver nitrate solution.

(b) Magnesium is more reactive than iron. It will displace iron from iron (II) chloride solution.

© Copper is less reactive than magnesium. It will not displace magnesium from magnesium sulphate solution.

(ii) X is potassium (K).
Potassium being soft can be cut by a knife and being lighter than water hence, it will float at the surface. The heat produced during reaction with water will melt it.