Calcium Reacting with Water

Ca + 2H2O → Ca(OH)2 + H2

Tổng quan

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.

Người tham gia

Vai trò Chất Hệ số Trạng thái
Chất phản ứng Calcium Ca 1 (s)
Chất phản ứng Water H₂O 2 (l)
Sản phẩm Calcium Hydroxide Ca(OH)₂ 1 (s)
Sản phẩm Hydrogen H 1 (g)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

Understanding calcium-water reactions is important for water hardness treatment, concrete chemistry, and calcium hydroxide production for industrial applications.

Tính chất

Loại
Single Replacement
Thuận nghịch
Không
Năng lượng
Tỏa nhiệt
ΔH
-635,1 kJ/mol

Phản ứng liên quan

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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.