test for aqueous cations effect of aqueous sodium hydroxide igcse chem
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8 Terms
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aluminium, Al^3+
white precipitate, soluble in excess, giving a colourless solution
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ammonium, NH4^+
ammonia produced on warming
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calcium, Ca^2+
white precipitate, insoluble in excess
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chromium(III), Cr^3+
green precipitate, soluble in excess
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copper(II), Cu^2+
light blue precipitate, insoluble in excess
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iron(II), Fe^2+
green precipitate, insoluble in excess, precipitate turns brown near surface on standing
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iron(III), Fe^3+
red-brown precipitate, insoluble in excess
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zinc, Zn^2+
white precipitate, soluble in excess, giving a colourless solution
Note 
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