The best reaction for use in our hand warmers was the 'slaking' of lime. It generated enough heat for our purposes, and involved chemicals (water, calcium oxide and calcium hydroxide) that are ...

The reaction of the potassium with water is similar to the ... the water but does not get nearly as hot as either the sodium or potassium. Also, the calcium hydroxide produced forms a white solid in ...

This triggers a chemical reaction in which the hydroxide and bicarbonate ions combine with naturally occurring calcium and ...