3. The Ca in a 200.0-mL sample of a natural water was determined by precipitating the cation as CaC204. The ppt was filt

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3 The Ca In A 200 0 Ml Sample Of A Natural Water Was Determined By Precipitating The Cation As Cac204 The Ppt Was Filt 1 (20.41 KiB) Viewed 8 times

3. The Ca in a 200.0-mL sample of a natural water was determined by precipitating the cation as CaC204. The ppt was filtered, washed, and ignited in a crucible with an empty mass of 26.6002 g. The mass of the crucible plus CaO (56.077 g/mol) was 26.7134 g. Calculate the concentration of Ca (40.078 g/mol) in the water in units of grams per 100 mL. Ca²+ CaO Mass crucible + CaO = 26.7134 g. Empty mass of crucible = 26.6002 g Mass of ppt CaO = 26.7134 g. -26.6002 g 0.1132 g