You will be able to demonstrate the principles of a redox reaction. Paint the potassium thiocyanate solution and potassium ferrocyanide solution onto a filter paper. Once they are dry you can spray the filter paper with iron (II) chloride and watch blue and red colors appear.

Kit Includes:

3 x 25mL Iron (III) Chloride, 0.1M Solution
1 x 30mL Potassium Thiocyanate, 0.1M Solution
1 x 30mL Potassium Ferrocyanide, 0.1M Solution