⚙️ how

How do alkali metals react with water?

ChemistryReactivity

Quick Answer

Alkali metals react with water to form a metal hydroxide and hydrogen gas. The reaction gets more vigorous down the group, with potassium and cesium reacting very dramatically.

The Full Story

Alkali metals are Group 1 elements such as lithium, sodium, and potassium. Each has one outer electron, which it loses easily in chemical reactions. When placed in water, they produce heat, a hydroxide solution, and hydrogen gas; sometimes the hydrogen ignites. Sodium is famous for skittering on water, while potassium can produce a lilac flame.

Key Facts

1.Alkali metals are in Group 1
2.The reaction produces hydrogen gas
3.Reactivity generally increases down the group

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Suggested video title for this topic:

"The elements that explode their way through water"