Why do alkali metals fizz in water?

When water touches alkali metals the reaction produces hydrogen gas and a strong alkaline solution, also known as a base. The further down the element lies on the periodic table, the more severe the reaction. read more

potassium + water potassium hydroxide + hydrogen. 2K (s) + 2H 2 O (l) 2KOH (aq) + H 2(g) All the hydroxides are strongly alkaline. Note the state symbol (aq) after the hydroxide, showing that it is dissolved in water. The alkali metals are so named because they form alkaline hydroxides in water. The metals themselves are not alkalis, they are just metals (neutral). read more

When potassium is added to water, the metal melts and floats. It moves around very quickly on the surface of the water. The hydrogen ignites instantly. The metal is also set on fire, with sparks and a lilac flame. There is sometimes a small explosion at the end of the reaction. read more