Chemical formula: aqueous solution of lead acetate (approx. 10 % Pb(CH3COO)2 in water)
Amount: 50 ml
Appearance and odour: clear liquid, with weak odour of vinegar.
Packaging: professional white HDPE 50 ml dropper bottle with screw-on conical protective cap. Labelled.
Description and uses:
This testing solution shows all the typical reactions of an aqueous lead (II) solution.
With iodide ions (I-) yellow lead (II) iodide (PbI2) is formed, with sulphate ions, white lead (II) sulphate (PbSO4).
Test sample solutions for chromium (Cr) by oxidising to Cr (VI) with hydrogen peroxide (H2O2, then simmer to destroy residual peroxide), then add lead acetate test solution. Chromate (CrO4(2-)) and dichromate (Cr2O7(2-)) then causes intensely yellow lead (II) chromate (PbCrO4) to precipitate, if chromium was initially present.
This test solution is also extremely sensitive to sulphide ions (S2-) because black lead (II) sulphide is extremely insoluble. Apply this solution to good quality filter or blotting paper to obtain so-called ‘lead acetate paper’ with a low detection limit for sulphides, even hydrogen sulphide (H2S, rotting eggs or ‘stink bomb’ gas) in the air.
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CAS: 301-04-2 (pure lead acetate)