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Gerald

Solutions & Solubility

Pure water, which is an odourless, colorless, and tasteless substance is often called the universal solvent. As water moves through soil, it dissolves very small amounts of minerals such as calcium and magnesium. The greater the content of calcium and magnesium, the more hard the water is. Therefore, hard water is the result of an excess of two elements, C and Mg. The hardness of water is measured in grains per gallon (gpg), milligrams per litre (mg/l) or parts per million (ppm). (See chart below)
Grains Per Gallon Miligrams
Per Liter (mg/l)
or Parts Per
Million (ppm) Rating
less than 1.0 less than 17.1 Soft
1.0 - 3.5 17.1 - 60 Slightly Hard
3.5 - 7.0 60 - 120 Moderately Hard
7.0 - 10.5 120 - 180 Hard
over 10.5 over 180 Very Hard

You can also detect hard water in your home by examining it for any evidence of film left on your body, the build-up of scale on cooking utensils, clogged pipes, appliances resulting in reduced water flow and......


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Approximate Word Count: 729
Approximate Pages: 3 (250 words per double-spaced page)

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