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
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Lithium Reacting with Water
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Iron Reacting with Hydrochloric Acid
Iron Displacing Copper from Copper Sulfate
Magnesium Reacting with Hydrochloric Acid
Copper Displacing Silver from Silver Nitrate
Iron Reacting with Copper(II) Chloride
Magnesium Reacting with Sulfuric Acid
Chlorine Displacing Iodine from Potassium Iodide
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.