NEETChemistryHydrogen
Why is magnesium hydroxide precipitated when hard water is boiled?
Options
- ABecause magnesium hydroxide is less soluble than magnesium carbonate
- BBecause magnesium hydroxide has a lower solubility product than magnesium carbonate
- CBecause magnesium hydroxide reacts with calcium ions in the water
- DBecause magnesium hydroxide forms strong hydrogen bonds with water molecules
Correct answer
B. Because magnesium hydroxide has a lower solubility product than magnesium carbonate
Step-by-step solution
Magnesium hydroxide is precipitated when hard water is boiled because it has a lower solubility product (K sp ) than magnesium carbonate, making it less soluble and causing it to form a precipitate.