chem source‎ > ‎

unit 5

startofdata[Salt appearance]Blue,Copper (II).Light green,Iron (II).Green,Copper (II) Chromium (III) OR Nickel (II).Purple,Manganate (VII).Brown,Iron (III).Pink,Manganese (II).Yellow,Chromate (VI).Orange,Dichromate (VI).;[Dilute Aq Solutions]Blue,Copper (II).Green,Iron (II) Chromium (III) OR Nickel (II).Purple,Manganate (VII).Brown,Iron (III).Pink,Manganese (II).Yellow,Chromate (VI) or Iron (III).Orange,Dichromate (VI).Colourless,Zinc.;[Sodium Hydroxide Solutions]Green ppt To green solution,Chromium (III).Green ppt stays insoluble,Nickel (II).Green ppt goes brown in air stays insoluble,Iron (II).Blue ppt Insoluble in excess,Copper (II).Brown ppt Insoluble in excess,Iron (III).Off white ppt Insoluble in excess and darkens with air,Manganese (II).White ppt,Insoluble in excess is Mg Ba Sr or Ca - colourless solution is Zinc (II).No ppt - Warm,Ammonia given off then ammonia otherwise Na or K.;[Ammonia Solutions]Green ppt forms green solution in excess,Chromium (III).Green ppt forms blue solution in excess,Nickel (II).Green ppt goes brown but insoluble,Fe (II).Blue ppt forms blue solution in excess,Copper (II).Brown ppt insoluble in excess,Iron (III).Off white ppt,Manganese (II).White ppt Insoluble in excess,Mangnesium.White ppt forms colourless solution in excess,Zinc (II).;[Barium Chloride solutions]Add barium chloride solution and add,Dilute HCL.White ppt insoluble in excess,Sulfate BaSO4.White ppt Soluble in excess with efferescence,Carbonate.White ppt Soluble in excess,Sulfite BaSO3.;[Halide tests]Silver nitrate forms soluble white ppt,Chlorine.Silver nitrate forms soluble cream ppt,Bromine.Silver nitrate forms insoluble yellow ppt,Iodine.Sulphuric acid forms steamy fumes,Chlorine.Sulphuric acid forms steamy fumes and brown vapour,Bromine.Sulphuric acid forms steamy fumes and purple vapour and black and yellow solids,Iodine.;endofdata