Question

define degree of hardness
and calculate degree of hardness

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Answer 1

Answer:

Degree of hardness is usually expressed as parts per million (ppm) and thus may be defined as the number of parts by weight of CaCO3 (equivalent to calcium and magnesium salts) present in a million (106) parts by weight of water.

Degrees of general hardness (dGH or °GH) is a unit of water hardness, specifically of general hardness. General hardness is a measure of the concentration of divalent metal ions such as calcium (Ca2+) and magnesium (Mg2+) per volume of water.

The total hardness is determined by the sum of Ca and Mg: TH = (2×1.40 + 2×0.23) meq/L = 3.26 meq/L – as presented in the diagram above. We use the same example water C1. sol and add 2 mM NaOH (with button Reac) 2. Here the difference is given by the pseudo hardness: PsH = 1.19 meq/L.

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