Calcium, magnesium, iron, manganese, nitrate, nitrite, chloride,and sodium are some
of the most abundant ions present in water samples. Two methods(predominant polyvalent cations
and all polyvalent cations) have been used to measure TotalHardness (TH). Discuss when
a) TH measured using the predominant polyvalent cations = THmeasured using all polyvalent cations
b) TH measured using the predominant polyvalent cations > THmeasured using all polyvalent cations
c) TH measured using the predominant polyvalent cations < THmeasured using all polyvalent cations
