a) For a better and desired particle precipitation, how can we control the Relative Supersaturation? b) The calcium in a 500.0 ml sample of a natural water was determined by precipitating the cation as CaCO.. The precipitate was filtered, washed, and ignited in a crucible with an empty mass of 30.2342g. The mass of the crucible plus CaO (56.077g/mol) was 34.3456 g. Calculate the concentration of Ca (40.078g/mol) in water in units of grams per 100 mL of the natural water