称取含磷样品0.1000g,溶解后把磷沉淀为MgNH4PO4.此沉定过滤洗涤再溶解,最后用0.01000mdL的EDTA标准溶液滴定,消耗20.00mL.样品中P2O5的百分含量为（）。已知M(MgNH4P04)=137.32gmol,M(P2O5)=14

2次阅读
溶解 样品 滴定

称取含磷样品0.1000g,溶解后把磷沉淀为MgNH4PO4.此沉定过滤洗涤再溶解,最后用0.01000md/L的EDTA标准溶液滴定,消耗20.00mL.样品中P2O5的百分含量为（）。已知M(MgNH4P04)=137.32g/mol,M(P2O5)=141.95g/mol.

A.13.79%

B.14.20%(正确答案)

C.27.46%

D.28.39%

猜你喜欢