One common way to remove phosphates from water is by the addition of what?
- Correct Answer: calcium hydroxide
- isotopes
- acetic acid
- nitrous oxide
Explanation: One common way to remove phosphates from water is by the addition of calcium hydroxide, known as lime, Ca(OH)2. The lime is converted into calcium carbonate, a strong base, in the water. As the water is made more basic, the calcium ions react with phosphate ions to produce hydroxylapatite, Ca5(PO4)3(OH), which then precipitates out of the solution:.
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