Category Archives: 11. Test-tube reactions identifying aqueous transition metal ions

11. An investigation of some transition metal compounds

An investigation of some transition metal compounds Most transition metal compounds are coloured. Some of them are used as dyes and pigments. A dye is a soluble coloured compound. A pigment is an insoluble coloured compound. Both dyes and pigments have to be resistant to chemical change. Three solutions, labelled P, Q and R, have been provided by a supplier

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