0.3 M solution of CoCl2-6H2O in its respective volume proportion was syn-thesized in 50 ml of distilled water at 37 ℃ under constant stirring until transparent pink solution was formed想问一下这句话是0.3mol每升的CoCl2-6H2O溶液加入到50mL蒸馏水中,还是CoCl2-6H2O溶于50mL的蒸馏水之后为0.3moL每升