Enter a balanced chemical equation for the reaction of solid rubidium with liquid water. Express your answer as a chemical equation. Identify all of the phases in your answer.

Md Ariful Islam

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Rubidium is an alkali metal in the same group (Group I) as sodium and as one goes down the group the ionization energy decreases.

Hence Rb also reacts with water leading to the formation of hydrogen gas. Its reaction with water is similar to that of sodium.

2Rb (s) + 2H2O (l) → H2 (g) + 2RbOH (l)

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