What compounds are formed when calcium and magnesium are precipitated out of water in the lime softening process?

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Multiple Choice

What compounds are formed when calcium and magnesium are precipitated out of water in the lime softening process?

Explanation:
In lime softening, raising the water's pH causes carbonate to form and react with calcium and magnesium ions to become insoluble carbonates. The calcium combines with carbonate to form calcium carbonate, and the magnesium forms magnesium carbonate, both of which precipitate out and carry hardness away. The other options describe compounds that aren’t produced as the insoluble precipitates in this process, such as oxides, bicarbonates, or unrelated treatment chemicals.

In lime softening, raising the water's pH causes carbonate to form and react with calcium and magnesium ions to become insoluble carbonates. The calcium combines with carbonate to form calcium carbonate, and the magnesium forms magnesium carbonate, both of which precipitate out and carry hardness away. The other options describe compounds that aren’t produced as the insoluble precipitates in this process, such as oxides, bicarbonates, or unrelated treatment chemicals.

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