The chemical equation K2CO3 + CO2 + H2O -> 2KHCO3

1. Detailed information about the equation K₂CO₃ + CO₂ + H₂O -> 2KHCO₃:

• Left side: K₂CO₃ is the salt potassium carbonate (also known as potash) and CO₂ is carbon dioxide gas. H₂O is water.
• Right side: 2KHCO₃ is the precursor salt of potassium bicarbonate (also known as potassium hydrocarbonate), a salt of a weak acid (carbonic acid) and a strong base (potassium hydroxide).

2. Reaction conditions:

This reaction occurs when heated.

3. Reaction process:

• During the reaction process, carbon dioxide (CO₂) reacts with water (H₂O) to create carbonic acid (H₂CO₃), then carbonic acid (H₂CO₃) reacts with potassium carbonate (K₂CO₃) to create the salt potassium bicarbonate (2KHCO₃), a salt of a weak acid and a weak base in solution.

4. Occurring phenomena:

• At room temperature, potassium bicarbonate (KHCO₃) is unstable and will decompose into potassium carbonate (K₂CO₃), water (H₂O), and carbon dioxide gas (CO₂).
• When the temperature rises (when heated), this decomposition process reverses, potassium carbonate (K₂CO₃) and carbon dioxide gas (CO₂) react with each other to form potassium bicarbonate (KHCO₃).