Calcium Chloride and Sodium Carbonate

CaCl2 + Na2CO3 → CaCO3 + 2NaCl

概要

Calcium chloride reacts with sodium carbonate to form insoluble calcium carbonate precipitate and sodium chloride. This is the basis of the water softening process where dissolved calcium ions are removed as insoluble carbonate. The white precipitate settles as chalk-like material.

参加者

役割 物質 係数 状態
反応物 Sodium Carbonate Na₂CO₃ 1 (aq)
生成物 Calcium Carbonate CaCO₃ 1 (s)
生成物 Sodium Chloride NaCl 2 (aq)

日常の例

Water softening systems in homes remove calcium hardness by precipitating calcium carbonate, reducing limescale buildup in pipes and appliances.

産業上の重要性

この反応は、工業用軟水化、製紙業(炭酸カルシウム充填剤)、そして炭酸ナトリウム生産のソルベー法に不可欠です。

特性

タイプ
Double Replacement
可逆的
いいえ
エネルギー
発熱性
ΔH
-13.0 kJ/mol

関連する反応

Iron(III) Chloride and Sodium Hydroxide Ammonia and Hydrochloric Acid (White Smoke) Calcium Carbonate and Hydrochloric Acid Barium Chloride and Sodium Sulfate Precipitation Calcium Hydroxide and Carbon Dioxide (Limewater Test) Sodium Hydroxide and Iron(III) Chloride (Rust Color) Sodium Hydroxide and Hydrochloric Acid Neutralization Potassium Hydroxide and Sulfuric Acid Sodium Carbonate and Hydrochloric Acid Aluminum Hydroxide and Hydrochloric Acid

Frequently Asked Questions

What is the equation for Calcium Chloride and Sodium Carbonate?
The balanced equation is: CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl.
What type of reaction is Calcium Chloride and Sodium Carbonate?
Calcium Chloride and Sodium Carbonate is a double replacement reaction.
Is Calcium Chloride and Sodium Carbonate exothermic or endothermic?
Calcium Chloride and Sodium Carbonate is exothermic (releases energy). The enthalpy change (ΔH) is -13.0 kJ/mol.