Sodium Carbonate and Hydrochloric Acid
Na2CO3 + 2HCl → 2NaCl + H2O + CO2
Overview
Sodium carbonate reacts with hydrochloric acid to produce sodium chloride, water, and carbon dioxide gas. The effervescence from CO2 evolution is a characteristic feature. This reaction is used to test for carbonate ions and occurs in two stages through bicarbonate intermediate.
Participants
| Role | Substance | Coefficient | State |
|---|---|---|---|
| Reactant | Sodium Carbonate Na₂CO₃ | 1 | (s) |
| Reactant | Hydrochloric Acid HCl | 2 | (aq) |
| Product | Water H₂O | 1 | (l) |
| Product | Carbon Dioxide CO₂ | 1 | (g) |
| Product | Sodium Chloride NaCl | 2 | (aq) |
Everyday Example
Cleaning products containing sodium carbonate fizz when they contact acidic substances like vinegar, due to this CO2-producing reaction.
Industrial Importance
Used in the Solvay process, in water softening, and in detergent formulations. The reaction is also used to neutralize acid spills safely.
Properties
- Type
- Double Replacement
- Reversible
- No
- Energy
- Exothermic
- ΔH
- -24.3 kJ/mol
Related Reactions
Aluminum Hydroxide and Hydrochloric Acid
Ammonia and Hydrochloric Acid (White Smoke)
Barium Chloride and Sodium Sulfate Precipitation
Calcium Carbonate and Hydrochloric Acid
Calcium Chloride and Sodium Carbonate
Calcium Hydroxide and Carbon Dioxide (Limewater Test)
Calcium Hydroxide and Sulfuric Acid
Copper(II) Sulfate and Sodium Hydroxide
Iron(III) Chloride and Sodium Hydroxide
Lead Nitrate and Potassium Iodide (Golden Rain)
Frequently Asked Questions
What is the equation for Sodium Carbonate and Hydrochloric Acid?
The balanced equation is: Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂.
What type of reaction is Sodium Carbonate and Hydrochloric Acid?
Sodium Carbonate and Hydrochloric Acid is a double replacement reaction.
Is Sodium Carbonate and Hydrochloric Acid exothermic or endothermic?
Sodium Carbonate and Hydrochloric Acid is exothermic (releases energy). The enthalpy change (ΔH) is -24.3 kJ/mol.