试题详情

KMnO4法测定石灰中Ca含量,先沉淀为CaC2O4,再过滤、洗涤后溶于H2SO4中,最后用KMnO4滴定H2C2O4,Ca的基本单元为()。

A#A.Ca#B.1/2Ca#C.1/5Ca#D.1/3Ca

B#A.Ca#B.1/2Ca#C.1/5Ca#D.1/3Ca

C#A.Ca#B.1/2Ca#C.1/5Ca#D.1/3Ca

D#A.Ca#B.1/2Ca#C.1/5Ca#D.1/3Ca