Calcium Reacting with Water

Ca + 2H2O → Ca(OH)2 + H2

概要

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.

参加者

役割 物質 係数 状態
反応物 Calcium Ca 1 (s)
反応物 Water H₂O 2 (l)
生成物 Calcium Hydroxide Ca(OH)₂ 1 (s)
生成物 Hydrogen H 1 (g)

日常の例

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

産業上の重要性

カルシウムと水の反応の理解は、水の硬度処理、コンクリートの化学、そして工業用途の水酸化カルシウム生産に重要です。

特性

タイプ
Single Replacement
可逆的
いいえ
エネルギー
発熱性
ΔH
-635.1 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 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.