A.0.2g/L B.2g/L C.200g/L D.2000g/L E.200g/mL
A.0.1g/L B.1g/L C.100g/L D.1000g/L E.100g/mL
A.BaCl2 B.CaCl2 C.AgCl2 D.CuCl2 E.KCl