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SOLVED: Another method of reporting the hardness of water is in grains (gr) per gallon. Take one grain to be 17.14 parts per million of calcium carbonate. What is the hardness of
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![SOLVED: Water containing more than 3.0 grains of dissolved solids per gallon is considered to be hard [1 grain (gr) = 64.8 mg]. What is this "hardness limit" in milligrams of dissolved](https://cdn.numerade.com/ask_images/bd81a22eb2fa4bd697b5e20449525803.jpg "SOLVED: Water containing more than 3.0 grains of dissolved solids per gallon is considered to be hard [1 grain (gr) = 64.8 mg]. What is this \"hardness limit\" in milligrams of dissolved")
SOLVED: Water containing more than 3.0 grains of dissolved solids per gallon is considered to be hard [1 grain (gr) = 64.8 mg]. What is this "hardness limit" in milligrams of dissolved
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