Students use a carbon rod attached to a power supply to oxidise iodide, ‘writing’ brown iodine patterns onto a piece of filter paper that is wet with colourless potassium iodide solution.
This activity was modified from
Commons, C., Hogendoorn, B. (Eds) (1990). Demonstrations for Secondary School Chemistry, Chemistry Education Association, Melbourne, p 127-128 (Demonstration K9).
- Student instructionsFile size 153.68 kB · Last modified · Download count 30
- Student booklet entryFile size 83.49 kB · Last modified · Download count 27
- Teacher instructions (method, materials, safety considerations)File size 298.85 kB · Last modified · Download count 23
- Student leader booklet entryFile size 98.95 kB · Last modified · Download count 23