Calgon used in water treatment is chemically ____________________?
Correct answer: B. Sodium hexametaphosphate
- A. Sodium phosphate
- B. Sodium hexametaphosphate
- C. Calcium phosphate
- D. Tricresyl phosphate
Explanation
Calgon is sodium hexametaphosphate, which complexes calcium and magnesium ions and helps prevent scale formation. It is therefore used as a water-softening or sequestrating agent.
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