Calcium Reacting with Water

Ca + 2H2O → Ca(OH)2 + H2

Visão geral

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

Papel Substância Coeficiente Estado
Reagente Calcium Ca 1 (s)
Reagente Water H₂O 2 (l)
Produto Calcium Hydroxide Ca(OH)₂ 1 (s)
Produto Hydrogen H 1 (g)

Exemplo do cotidiano

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

Importância industrial

A compreensão das reações cálcio-água é importante para o tratamento da dureza da água, a química do betão e a produção de hidróxido de cálcio para aplicações industriais.

Propriedades

Tipo
Single Replacement
Reversível
Não
Energia
Exotérmico
ΔH
-635,1 kJ/mol

Reações relacionadas

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.