Question
What is deionized water? How will you prepare deionized water from a sample of hard water?
Answer
Deionized water is water that has had its mineral ions, such as calcium, magnesium, sodium, and chloride, removed through a process called deionization.
To prepare deionized water from a sample of hard water, you can use an ion exchange process. Here’s a simplified explanation:
- Pass the hard water sample through an ion exchange resin, in a column or tank.
- The resin selectively binds and removes the mineral ions from the water, exchanging them with hydrogen (H+) or hydroxide (OH–) ions.
- Continue passing the water through the resin until the desired level of deionization is achieved.
- Collect the deionized water that has been stripped of mineral ions.
