dolor (plural dolors) ( 1 literary) Sorrow, grief, misery or anguish. 2  A unit of pain used to theoretically weigh people's outcomes.
Potassium, K. Reaction with water. When a small piece of potassium is added to water, it produces a hissing sound as it burns with a lilac flame. It also moves about quickly on the water surface. [ image ]. Hydrogen gas is given out in the reaction. The resulting alkaline solution will turn red litmus blue because of the potassium hydroxide formed.
The reaction releases heat, and as the sodium and the solution warm up, the reaction goes faster and faster. If the sodium gets trapped on the water's edge or against some other obstacle, enough heat can be generated to boil the water around the metal and actually melt the sodium. This is a dangerous reaction. If the sodium gets hot enough, the hydrogen jets can ignite and burn.