If CO2 is passed through slaked lime, it gives out calcium carbonate (CaCO3) also called marble/limestone. This is due to the insoluble suspension of calcium carbonate formed. The reaction is:
Ca(OH)2 + CO2 → CaCO3 + H2O
Uses of slaked lime
- In sewage treatment, one major application of slaked lime is as a flocculant.
- It has a strong anti-microbial effect
- Slaked lime is widely used in the food industry
- It is used in the paper industry.