Description of experiment
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Needed compounds:
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sulphuric acid : H2SO4
nickel sulfate : NiSO4 . 6H2O
potassium ferrocyanide : K4 [Fe(CN)6] . 3H2O
Class:
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elem=Ni,Fe
precipitation
Summary:
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The nickel (II) salt of ferrocyanide is not soluble in water.
Description:
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Dissolve some nickel sulfate in dilute sulphuric acid (a few %) and add a
solution of potassium ferrocyanide: Formation of a pale blue/green (mint-
green) precipitate.