Calcium Reacting with Water

Ca + 2H2O → Ca(OH)2 + H2

概述

Calcium reacts with water to produce calcium hydroxide (limewater) and hydrogen gas. The reaction is moderately vigorous, producing a milky suspension of sparingly soluble calcium hydroxide. Calcium sinks in water (unlike sodium) and reacts at the bottom of the vessel.

参与者

角色 物质 系数 状态
反应物 Calcium Ca 1 (s)
反应物 Water H₂O 2 (l)
产物 Calcium Hydroxide Ca(OH)₂ 1 (s)
产物 Hydrogen H 1 (g)

日常示例

The milky appearance of hard water deposits and limescale is related to calcium hydroxide and carbonate formation from calcium's reactions in water.

工业重要性

理解钙-水反应对水硬度处理、混凝土化学,以及工业氢氧化钙的生产非常重要。

属性

类型
Single Replacement
可逆
否
能量
放热
ΔH
-635.1 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 Calcium Reacting with Water?
The balanced equation is: Ca + 2H₂O → Ca(OH)₂ + H₂.
What type of reaction is Calcium Reacting with Water?
Calcium Reacting with Water is a single replacement reaction.
Is Calcium Reacting with Water exothermic or endothermic?
Calcium Reacting with Water is exothermic (releases energy). The enthalpy change (ΔH) is -635.1 kJ/mol.