Respuesta :
A water sample contains 40 mg/l ca2 and 8 mg/l mg2. The water hardness (CaCO₃) is 132.824 mg/L.
How do I determine the hardness of my water?
- The hardness of calcium carbonate is measured in milligrams per liter (mg/L) or grains per gallon (gpg). The formula for hardness is Hardness = 2.497 (Ca) + 4.118. (Mg).
- A hardness test is typically conducted by pressing a precisely dimensioned and loaded object (indenter) into the surface of the material being tested. The hardness is determined by measuring the depth of indenter penetration or the size of the indenter impression.
- Water hardness is caused by the presence of soluble bicarbonates, chlorides, and calcium and magnesium sulfates. Hard water is water that does not lather with soap. Water is the most important compound required for life on Earth to survive.
Hardness = 2.497 (Ca) + 4.118 (Mg)
Hardness = 2.497 (40) + 4.118 (8)
Hardness = 99.88 + 32.944
Hardness = 132.824 mg/L
The water hardness (CaCO₃) is 132.824 mg/L.
To learn more about water hardness refer to
https://brainly.com/question/1870140
#SPJ4
