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 metal belongs to the alkali group on the periodic table. Light enough to float on water, potassium has an instant reaction when it comes into contact with the fluid. Adding potassium to water causes an instant chemical reaction that results in the temperature of the metal rising so high that it ignites. Hydrogen gas from the reaction coming into contact with oxygen in the air is what causes the potassium to catch fire. The metal then glows with a pale, lilac flame. The chemical reaction of potassium with water forms a potassium hydroxide solution that has no color along with the hydrogen gas.