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4 February, 08:05

What is the standard deviation of soft water

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  1. 4 February, 08:17
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    Answer: According to the USGS, the hardness of water is determined based on the concentration of dissolved multivalent cations: soft water - 0 to 60 mg/L (milligrams per liter) as calcium carbonate. moderately hard water - 61 to 120 mg/L. hard water - 121 to 180 mg/L
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