so won't ya please help me?? i have to do my quant lab, and for some reason, i'm trying to do the practice problem before i do the actual lab results, but i can't get the right answer. if anyone cares to take time out of their busy day to help me, it would be incredibly gratefulyl appreciated. this ist he problem: a 25.00 mL aliquot of unknown CaCO3 is titrated with EDTA to give a 22.50 mL equivalence point. Find the % CaO if the sample weigfhed .2200 g and was diluted to 250 mL in a vol. flask. The molarrity of EDTA is 0.0090 M, the FW of CaO is 56.072, FW of CaCO3 is 100.1 any help would be appreciated, even a general formula would be useful. thanks again.