Once the rust is dissolved, potassium carbonate is slowly added to the solution, turning it a bright green. The rest of the process happens more or less naturally, as crystals begin to form in the ...

Human activity continues to dump too much CO2 into the atmosphere, raising the risk of catastrophic global warming. At the same time, the most climate-friendly way to keep using fossil fuels, carbon ...

The first 'reaction' that we tried for our hand warmer involved dissolving potassium carbonate (K 2 CO 3) in water. Potassium carbonate is one of the chemicals left behind in the ashes of burnt wood.