Question

You are provided with three metals: sodium, magnesium and copper, using only water as the reactant, how will you identify each of them.

Answer 1

you replaced the magnesium in this cell with other metals you would obtain different voltage readings. By arranging ...

Answer 2

Answer:

ACTION OF SODIUM WITH COLD WATER:sodium reacts vigorously with cold water to form sodium hydroxide

ACTION OF MAGNESIUM WITH HOT WATER: magnesium doesn't react with cold water but it reacts with hot water to form magnesium hydroxide.

ACTION OF COPPER WITH BOTH COLD AND HOT WATER: no reaction take place.