NEET
- Exam
- NEET
- Subject
- Chemistry
- Chapter
- Hydrogen
NEET · Chemistry · Hydrogen
What happens when Calgon (sodium hexametaphosphate) is added to...
What happens when Calgon (sodium hexametaphosphate) is added to hard water?
Options
- AIt increases the hardness of the water.
- BIt has no effect on the water hardness.
- CIt reacts with hardness ions to form soluble complexes.
- DIt precipitates hardness ions as insoluble compounds.
Correct answer
C. It reacts with hardness ions to form soluble complexes.
Step-by-step solution
Calgon (sodium hexametaphosphate) reacts with hardness ions in hard water to form soluble complexes, preventing the precipitation of hardness ions.