Chemistryhard · Past Paper
What happens when Carbon dioxide is passed through limewater for a LONG time?
AIt stays milky
BThe milkiness disappears
CIt turns blue
DA black precipitate forms
✓ Correct Answer: B — The milkiness disappears
Excess CO2 reacts with the insoluble calcium carbonate to form soluble calcium bicarbonate, making the solution clear again.
Share this question
More from Chemistry
- Which acid is used to identify the presence of carbonates?
- What is the effect of an inhibitor in a chemical reaction?
- Calculate the percentage of Iron in pure Magnetite (Fe3O4). (Atomic mass: Fe=56, O=16)
- What is the role of Cryolite (Na3AlF6) in the extraction of Aluminum?
- Copper pyrites is chemically represented as: