Manganese traffic light
How to make a traffic light from potassium permanganate
Warning! Only under adult supervision.
Reagents and equipment
- potassium permanganate solution;
- alkaline glucose solution (glucose solution + drain cleaner);
In an alkaline medium, glucose reduces potassium permanganate, first to potassium manganate, and then to manganese(IV) oxide. In this case, the solution changes colors from raspberry-red to green, then to brown.
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