CaCl is precipitated by treatment with ammonium oxalate. After raising the pH with aqueous ammonia, the calcium selectively precipitates as the oxalate salt. CaCl(aq) + (NH4)2C2O4 CaCO4(s) + 2NH4Cl(aq) 0.11 g of CaCl 5 mL of (NH4)2C2O4 (density is 2.5 mg per mL) Calculate resulting CaC2O4.