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.
This principle is well demonstrated in the reaction of an alkali metal with water. Below is the generic form of an alkali metal (represented by M) with water and the chemical reaction for potassium metal reacting with water. The alkali metal added to water makes hydrogen gas, alkali ions, and hydroxide ions.