Potassium Reacting with Water

2K + 2H2O → 2KOH + H2

概述

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.

参与者

角色 物质 系数 状态
反应物 Potassium K 2 (s)
反应物 Water H₂O 2 (l)
产物 Hydrogen H 1 (g)
产物 Potassium Hydroxide KOH 2 (aq)

日常示例

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

工业重要性

氢氧化钾（苛性钾）是重要的工业碱，用于生产液体肥皂、电池电解液和有机化学品的合成。

属性

类型
Single Replacement
可逆
否
能量
放热
ΔH
-392.2 kJ/mol

相关反应

Magnesium Reacting with Steam Lithium Reacting with Water Aluminum Reducing Chromium Oxide (Aluminothermic) Iron Reacting with Hydrochloric Acid Iron Displacing Copper from Copper Sulfate Magnesium Reacting with Hydrochloric Acid Copper Displacing Silver from Silver Nitrate Iron Reacting with Copper(II) Chloride Magnesium Reacting with Sulfuric Acid Chlorine Displacing Iodine from Potassium Iodide

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.