Potassium Reacting with Water

2K + 2H₂O → 2KOH + H₂

Visão geral

Potassium reacts even more violently with water than sodium, instantly producing potassium hydroxide and hydrogen gas. The hydrogen ignites immediately with a characteristic lilac/violet flame from potassium vapor. The reaction can cause small explosions due to its extreme vigor.

Participantes

Papel	Substância	Coeficiente	Estado
Reagente	Potassium K	2	(s)
Reagente	Water H₂O	2	(l)
Produto	Hydrogen H	1	(g)
Produto	Potassium Hydroxide KOH	2	(aq)

Exemplo do cotidiano

Chemistry demonstrations with potassium in water produce a spectacular violet flame as the evolved hydrogen ignites spontaneously.

Importância industrial

O hidróxido de potássio (potassa cáustica) é um alcali industrial importante utilizado na produção de sabão, eletrólito de baterias e produção de fertilizantes.

Propriedades

Tipo: Single Replacement
Reversível: Não
Energia: Exotérmico
ΔH: -392,2 kJ/mol

Reações relacionadas

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Frequently Asked Questions

What is the equation for Potassium Reacting with Water?

The balanced equation is: 2K + 2H₂O → 2KOH + H₂.

What type of reaction is Potassium Reacting with Water?

Potassium Reacting with Water is a single replacement reaction.

Is Potassium Reacting with Water exothermic or endothermic?

Potassium Reacting with Water is exothermic (releases energy). The enthalpy change (ΔH) is -392.2 kJ/mol.