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 following experiment should be carried out with care. Calcium reacts with dilute hydrochloric acid to give calcium chloride and hydrogen gas. Calcium reacts with dilute sulphuric acid to give calcium sulfate and hydrogen gas.Initial reaction is fast, but gradually slows down.This is because calcium sulfate is quite insoluble in water, which forms a protective layer on calcium and preventing the acid to react effectively with calcium.alcium, Ca. Reaction with water. When a small piece of calcium is added to water, it sinks to the bottom of the water. Colorless gas bubbles evolved at a moderate rate.