i) A metal higher in the activity order can displace copper metal from a solution of copper
ions. Put 10 mL of molar copper sulphate solution in a small beaker. Clean magnesium ribbon
and cut into 0.5 cm pieces. Add these pieces to the copper sulphate solution one at a time.
The reaction can be vigorous! Copper metal deposits and the blue colour gradually disappear
as the magnesium displaces the copper ion. Note any heat given out by the reaction. When
the solution is colourless, decant the solution from the red copper powder at the bottom of
the beaker. Collect the copper and dry it.
Mg(s) + Cu2+(aq) -> Mg2+(aq) + Cu(s)
(ii) Repeat the experiment by attempting to displace copper metal using powdered zinc and
iron metal. Note the comparative activity of the metals.
sharon kalunda answered the question on April 12, 2019 at 08:33
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