Potassium Reacting with Water

2K + 2H2O → 2KOH + H2

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Potassium K 2 (s)
Reaktant Water H₂O 2 (l)
Produkt Hydrogen H 1 (g)
Produkt Potassium Hydroxide KOH 2 (aq)

Alltägliches Beispiel

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

Industrielle Bedeutung

Potassium hydroxide (caustic potash) is an important industrial alkali used in soap making, battery electrolyte, and fertilizer production.

Eigenschaften

Typ
Single Replacement
Reversibel
Nein
Energie
Exotherm
ΔH
-392,2 kJ/mol

Verwandte Reaktionen

Aluminum Reacting with Iron(III) Oxide (Thermite) Chlorine Displacing Iodine from Potassium Iodide Magnesium Reacting with Steam Lithium Reacting with Water Aluminum Reacting with Hydrochloric Acid Aluminum Reducing Chromium Oxide (Aluminothermic) Iron Reacting with Hydrochloric Acid Iron Displacing Copper from Copper Sulfate Zinc Displacing Copper from Copper Sulfate Fluorine Displacing Chlorine from Sodium Chloride

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.