NEETChemistryHydrogen
What is the purpose of adding Calgon to hard water?
Options
- ATo make the water more acidic
- BTo increase water hardness
- CTo soften the water by preventing the precipitation of hardness ions
- DTo remove all dissolved ions from the water
Correct answer
C. To soften the water by preventing the precipitation of hardness ions
Step-by-step solution
Adding Calgon to hard water helps soften the water by forming soluble complexes with hardness ions, preventing their precipitation.