A piece of iron, e.g.
an iron nail, is dropped into a solution of copper sulphate. The nail gets coated with
copper metal. Write the reaction that takes place, and the redox equation. Which atom has
reduced, and which was oxidised.
Pure zinc metal is
placed into dilute hydrochloric acid. Hydrogen gas H2 is given off. Write the
general equation and the redox equation. Which atom has reduced, and which was oxidised.
For Your Info...
Oxidation-Reduction Reactions are: "All reactions that
involve the change of an oxidation number, or transfer of electrons among the reacting
Principal Oxidising Agents are: Potassium permanganate,
potassium dichromate, iodine, potassium iodate, potassium bromate
Frequently used Reducing Agents are: iron (ii), tin (ii)
compounds, sodium thiosulphate, mercury (i) nitrate, chromium (ii) chloride or sulphate