Chemical elements
    Physical Properties
    Chemical Properties
      Lead Tetramethyl
      Lead Tetraethyl
      Lead Tetraphenyl
      Lead Ethoxide
      Lead Fluoride
      Lead Tetrafluoride
      Hydrofluoplumbic Acid
      Lead Chloride
      Lead Chloride Double Salts
      Basic Lead Chlorides
      Lead Tetrachloride
      Ammonium Plumbichloride
      Lead Chlorite
      Lead Chlorate
      Lead Perchlorate
      Lead Dibromide
      Double Salts of Lead Bromide
      Basic Lead Bromides
      Lead Bromate
      Lead Iodide
      Lead Iodide Complex Salts
      Basic Lead Iodides
      Lead Tetra-iodide
      Lead Iodate
      Lead Periodates
      Lead Suboxide
      Lead Monoxide
      Lead Hydroxides
      Lead Dioxide
      Plumbic Acids
      Hexahydroxyplumbic Acid
      Colloidal Plumbic Acid
      Potassium Plumbate
      Lead Plumbate
      Calcium Orthoplumbate
      Lead Orthoplumbate
      Red Lead
      Metaplumbic Acid
      Calcium Metaplumbate
      Lead Metaplumbate
      Basic Lead Plumbate
      Lead Sulphide
      Lead Sulphohalides
      Lead Polysulphide
      Lead Sulphite
      Lead Sulphates
      Lead Sulphate
      Basic Lead Sulphates
      Lead Hydrogen Sulphate
      Plumbic Sulphate
      Lead Persulphate
      Lead Thiosulphate
      Lead Dithionate
      Lead Selenide
      Lead Selenite
      Lead Selenate
      Lead Telluride
      Lead Tellurite
      Lead Azide
      Lead Azoimide
      Lead Hydrazoate
      Lead Imide
      Lead Hyponitrite
      Lead Nitrites
      Lead Nitrate
      Lead saltpetre
      Basic Lead Nitrates
      Lead Hypophosphite
      Lead Phosphite
      Lead Orthophosphate
      Lead Monohydrogen Phosphate
      Lead Dihydrogen Phosphate
      Lead Pyrophosphate
      Lead Metaphosphate
      Lead Arsenite
      Lead Orthoarsenate
      Lead Hydrogen Arsenate
      Lead Pyroarsenate
      Lead Antimonate
      Lead Carbonate
      White Lead
      Lead Formate
      Lead Acetate
      Sugar of Lead
      Complex Lead Acetates
      Plumbic Acetate
      Lead Tetra-acetate
      Lead Oxalate
      Lead Tartrate
      Lead Silicates
      Lead Borates
      Normal Lead Chromate
      Lead Dichromate
      Basic Lead Chromate
      Lead Molybdate
      Lead Tungstate
      Lead Metatungstate
      Lead Diuranate
      Lead Peruranate
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Lead Thiosulphate, PbS2O3

Lead Thiosulphate, PbS2O3, is formed as a white precipitate, which may be amorphous or crystalline, when sodium thiosulphate is added to a lead salt solution. When heated it turns black, decomposing into lead sulphide and sulphate, together with sulphur and sulphur dioxide. It burns in the air; and when mixed with an oxidising agent has been employed in the manufacture of matches free from phosphorus. When sodium thiosulphate is added to a boiling solution of a lead salt containing ammonium chloride the whole of the lead is precipitated as sulphide, together with free sulphur. Lead thiosulphate is very slightly soluble in water; according to Rammelsberg, 1 part dissolves in 3266 parts of water. Hot water decomposes this salt, producing sulphide, sulphate, and free sulphur, with small amounts of sulphuric acid, the main reaction being:

4PbS2O3 = PbS + 4S + 3PbSO4.

It is more soluble in thiosulphate solutions, owing to the formation of complex salts, a number of which are known.

PbS2O3.Li2S2O3 is a crystalline salt which readily absorbs and is decomposed by water with formation of lead monosulphide.

PbS2O3.2Na2S2O3, obtained by adding lead acetate to concentrated sodium thiosulphate solution, is crystalline, and slightly soluble in water. PbS2O3.2K2S2O3.2H2O crystallises from a saturated solution of lead thiosulphate in potassium thiosulphate solution. The following salts also exist:

PbS2O3.2(NH4)2S2O3.3H2O, PbS2O3.2Cs2S2O3.3H2O, PbS2O3.2Rb2S2O3.2H2O, PbS2O3.2CaS2O3.4H2O, PbS2O3.Cs2S2O3.2H2O.

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