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Small heaps of salt in a wet field
Four images in one, clockwise from top left: metallic, pharmaceutical equipment; piles of salt in a watery field; a rotary evaporator; a scientist performing a test
Flow diagram showing the progression of concepts involved in separation by evaporation, filtration and crystallisation
One large bowl with blue copper sulfate crystals, one watch-glass with smaller crystals
A glass vial with blue liquid in a sand bath