A copper "pen" will be used to electrolyze a solution of potassium iodide and draw on a piece of filter paper. The color of the "ink" will change depending on whether the copper is acting as the cathode or the anode in the electrolytic cell. There are enough materials to complete the demonstration 5 times.

Kit Includes:

1 x 25mL Phenolphthalein, 1% Solution
1 x 8g Potassium Iodide
1 x 2.5g Soluble Starch
1 x Copper Wire
1 x Aluminum Pan
1 x Red connecting Wire
1 x Black connecting Wire
10 x Filter Paper Pieces
5 x Plastic Straws