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.
REACTIONS OF THE GROUP 1 ELEMENTS WITH WATER This page looks at the reactions of the Group 1 elements-lithium, sodium, potassium, rubidium and caesium-with water. It uses these reactions to explore the trend in reactivity in Group 1.The Facts General All of these metals react vigorously or even explosively with cold water. In each case, a solution of the metal hydroxide is produced together with hydrogen gas.aesium explodes on contact with water, quite possibly shattering the container. Caesium hydroxide and hydrogen are formed. Summary of the trend in reactivity. The Group 1 metals become more reactive towards water as you go down the Group.