Calcium Reacting with Water

Ca + 2H2O → Ca(OH)2 + H2

Descripción general

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.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Calcium Ca 1 (s)
Reactivo Water H₂O 2 (l)
Producto Calcium Hydroxide Ca(OH)₂ 1 (s)
Producto Hydrogen H 1 (g)

Ejemplo cotidiano

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

Importancia industrial

Comprender las reacciones calcio-agua es importante para el tratamiento de la dureza del agua, la química del hormigón y la producción de hidróxido de calcio para aplicaciones industriales.

Propiedades

Tipo
Single Replacement
Reversible
No
Energía
Exotérmico
ΔH
-635,1 kJ/mol

Reacciones relacionadas

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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.