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Hard water contains calcium and magnesium, which undergo oxidation and clog water pipes. Which statement best describes this change as a chemical change?
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Hard water contains calcium and magnesium, which undergo oxidation and clog water pipes. Which statement best describes this change as a chemical change?

User Troyseph
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Calcium and magnesium precipitate into their respective oxides. Precipitate formation is an important clue to chemical change.

(Tell me if it's right :^D)
User J Slick
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