Calcium Reacting with Water

Ca + 2H2O → Ca(OH)2 + H2

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Calcium Ca 1 (s)
반응물 Water H₂O 2 (l)
생성물 Calcium Hydroxide Ca(OH)₂ 1 (s)
생성물 Hydrogen H 1 (g)

일상 속 예시

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

산업적 중요성

칼슘-물 반응의 이해는 물 경도 처리, 콘크리트 화학, 그리고 산업용 수산화칼슘 생산에 중요합니다.

성질

유형
Single Replacement
가역 반응
아니오
에너지
발열
ΔH
-635.1 kJ/mol

관련 반응

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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.