Question

name different units of hardness of water​

Answer 1

Answer:

Water hardness is unfortunately, expressed in several different units and it is often necessary to convert from one unit to another when making calculations.

Explanation:

Most commonly used units include grains per gallon (gpg), parts per million (ppm), and milligrams per liter (mg/L).

Answer 2

Measures of water hardness

General guidelines for classification of waters are : 0 to 60 mg/L ( milligrams per liter ) as calcium carbonate is classified as soft ; 61 to 120 mg/L as moderately hard ; 121 to 180 mg/L as hard ; and more than 180 mg/L as very hard . Lime scale buildup inside a water pipe .