Asolution containing a mixture of 0.0379 m potassium chromate ( k2cro4 ) and 0.0739 m sodium oxalate ( na2c2o4 ) was titrated with a solution of barium chloride ( bacl2 ) for the purpose of separating cro2−4 and c2o2−4 by precipitation with the ba2+ cation. the solubility product constants ( ksp ) for bacro4 and bac2o4 are 2.10×10−10 and 1.30×10−6 , respectively. which barium salt will precipitate first?