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Zero hardness of water is achieved by
- a)Lime soda process
- b)Excess lime treatment
- c)Ion exchange treatment
- d)Excess alum and lime treatment
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Zero hardness of water is achieved bya)Lime soda processb)Excess lime ...
Water of zero hardness can be obtained from ion exchange method only. It is also called zeolite process or base exchange treatment.
Most Upvoted Answer
Zero hardness of water is achieved bya)Lime soda processb)Excess lime ...
Zero hardness of water is achieved by ion exchange treatment.
Explanation:
Hardness of water refers to the presence of certain minerals, primarily calcium and magnesium ions, which can cause various problems such as scale formation, reduced effectiveness of soaps and detergents, and corrosion of pipes and appliances. The hardness of water is measured in terms of the concentration of these minerals.
Ion Exchange Treatment:
Ion exchange is a water treatment process that removes undesirable ions from water and replaces them with more desirable ions. In the case of hardness removal, the process involves exchanging calcium and magnesium ions with sodium ions.
Working Principle:
The ion exchange process involves passing the water through a resin bed, which contains tiny beads of resin. These resin beads are typically made of a polymer material, such as polystyrene, which has been chemically modified to have charged sites that can attract and hold ions.
The resin beads are initially saturated with sodium ions. As the water flows through the resin bed, the calcium and magnesium ions in the water are attracted to the charged sites on the resin beads and are exchanged with sodium ions. This results in the removal of hardness-causing minerals from the water and the release of sodium ions into the water.
Regeneration:
Over time, the resin bed becomes exhausted as it becomes saturated with calcium and magnesium ions. To restore the resin's capacity for hardness removal, the resin bed needs to be regenerated. This is done by flushing a concentrated salt solution, typically sodium chloride or potassium chloride, through the resin bed. The sodium or potassium ions in the salt solution displace the calcium and magnesium ions on the resin beads, effectively recharging the resin bed.
Advantages of Ion Exchange:
- Efficient removal of hardness-causing minerals.
- Consistent and predictable performance.
- Can be used for both residential and industrial applications.
Conclusion:
Ion exchange treatment is an effective method for achieving zero hardness of water. It involves the use of resin beads to exchange calcium and magnesium ions with sodium ions, resulting in the removal of hardness-causing minerals from the water. The resin bed needs to be periodically regenerated to maintain its effectiveness.
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Zero hardness of water is achieved bya)Lime soda processb)Excess lime treatmentc)Ion exchange treatmentd)Excess alum and lime treatmentCorrect answer is option 'C'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about Zero hardness of water is achieved bya)Lime soda processb)Excess lime treatmentc)Ion exchange treatmentd)Excess alum and lime treatmentCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Zero hardness of water is achieved bya)Lime soda processb)Excess lime treatmentc)Ion exchange treatmentd)Excess alum and lime treatmentCorrect answer is option 'C'. Can you explain this answer?.
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