Hydrochloric Acid and Calcium Hydroxide
2HCl + Ca(OH)2 → CaCl2 + 2H2O
Overview
Hydrochloric acid reacts with calcium hydroxide (slaked lime) to form calcium chloride and water. Calcium hydroxide is a dibasic compound that requires two equivalents of HCl. This neutralization is widely used in water treatment and industrial acid waste handling.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Reactant | Calcium Hydroxide Ca(OH)₂ | 1 | (s) |
| Reactant | Hydrochloric Acid HCl | 2 | (aq) |
| Product | Water H₂O | 2 | (l) |
Everyday Example
Road salt (calcium chloride) used for de-icing in winter can be produced by this neutralization reaction.
Industrial Importance
Calcium chloride is used for de-icing, dust control on unpaved roads, concrete acceleration, and as a desiccant. The lime-HCl neutralization is used in acid waste treatment.
Properties
- Type
- Acid-Base
- Reversible
- No
- Energy
- Exothermic
- ΔH
- -118.0 kJ/mol
Related Reactions
Acetic Acid and Sodium Acetate Buffer System
Acetic Acid and Sodium Hydroxide Neutralization
Acetic Acid Dissociation in Water
Aluminum Chloride and Chloride Ion (Lewis Acid-Base)
Aluminum Hydroxide as Amphoteric Acid with NaOH
Aluminum Hydroxide as Amphoteric Base with HCl
Ammonia and Ammonium Chloride Buffer System
Ammonia and Hydrochloric Acid
Ascorbic Acid and Sodium Hydroxide
Barium Hydroxide and Ammonium Thiocyanate (Endothermic)
Frequently Asked Questions
What is the equation for Hydrochloric Acid and Calcium Hydroxide?
The balanced equation is: 2HCl + Ca(OH)₂ → CaCl₂ + 2H₂O.
What type of reaction is Hydrochloric Acid and Calcium Hydroxide?
Hydrochloric Acid and Calcium Hydroxide is a acid-base reaction.
Is Hydrochloric Acid and Calcium Hydroxide exothermic or endothermic?
Hydrochloric Acid and Calcium Hydroxide is exothermic (releases energy). The enthalpy change (ΔH) is -118.0 kJ/mol.