Preparing a solution

Preparing a solution

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This image is part of the sequence Science and technology: Preparing a solution

Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Preparing a solution. Water from a wash bottle being used to top up a solution of iron (II) sulphate to the mark engraved in the neck of a volumetric flask. The green colour arises from the transition metal ion present here, in this case iron. The Fe ion is in its +2 (II) oxidation state, and is forming a hydrated complex ion structure with molecules of water. Iron (II) sulphate is used as a food additive and as a dye.

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Keywords: apparatus, aqueous, chemical, chemistry, crystals, diluting, equipment, ferrous sulphate, glassware, grey background, heptahydrate, iron (ii) sulphate, iron sulfate, iron sulphide, lab, laboratory, one person, pouring, preparing, school science, science education, topping-up, volumetric flask, wash bottle, water

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