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 magnesium in seawater. Altogether, it leads to the formation of solid ...

The limewater test for carbon dioxide is also a qualitative analysis based on a precipitation reaction. Limewater is a solution of calcium hydroxide and the precipitate is calcium carbonate.

A few drops of dilute sodium hydroxide solution react to form a white precipitate with aluminium ions, calcium ions and magnesium ions. However, if excess sodium hydroxide solution is added ...