Potassium Reacting with Water

2K + 2H2O → 2KOH + H2

概要

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.

参加者

役割 物質 係数 状態
反応物 Potassium K 2 (s)
反応物 Water H₂O 2 (l)
生成物 Hydrogen H 1 (g)
生成物 Potassium Hydroxide KOH 2 (aq)

日常の例

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

産業上の重要性

水酸化カリウム（苛性カリ）は石鹸製造、電池電解液、肥料生産に使用される重要な工業用アルカリである。

特性

タイプ
Single Replacement
可逆的
いいえ
エネルギー
発熱性
ΔH
-392.2 kJ/mol

関連する反応

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.