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.
Magnesium will not react with cold water. Even finely powdered magnesium reacts only very slowly. Magnesium will react with gaseous water (steam) to. form magnesium oxide and hydrogen gas. You must know how to test for hydrogen gas. magnesium + steam magnesium oxide + hydrogen.