GPG = grains [of hard water minerals) per gallon where one grain is a unit of weight measurement first defined in Egypt as equivalent to one grain of wheat or roughly 1/7000 of a pound . 1 Grain = 0.0001428571 pounds Table of Degrees of Water Hardness ...
A water sample is suspected to be contaminated by Hg (II) ions. How could you determine if the sample is really contaminated? Qualitative Analysis The identification of chemical species in any substance can be done using certain chemical test...