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
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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.