Chemical elements
  Lead
    Occurrence
    Isotopes
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      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
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      Lead Tetra-iodide
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      Litharge
      Massicot
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      Plumbic Acids
      Hexahydroxyplumbic Acid
      Colloidal Plumbic Acid
      Potassium Plumbate
      Lead Plumbate
      Calcium Orthoplumbate
      Lead Orthoplumbate
      Red Lead
      Metaplumbic Acid
      Calcium Metaplumbate
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      Basic Lead Plumbate
      Lead Sulphide
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      Lead Sulphate
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      Lead Hydrogen Sulphate
      Plumbic Sulphate
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      Lead Dithionate
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      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
    PDB 1afv-3qjk

Lead Chloride Double Salts






The solubility of lead chloride in water is diminished by the presence of small quantities of potassium chloride, and increased when the concentration of the latter salt passes a certain value. The minimum solubility of lead chloride at 25.2° C. is 0.00483 gram-molecule per litre, and is reached when the potassium chloride is of 1.5018 N strength.

This variation in solubility, which is similar to that of lead chloride in hydrochloric acid, is attributed to the same cause, viz. to the mass action of chloride ions at low concentration, and to the formation of complex ions PbCl4' at higher concentrations.

The existence of several double chlorides of lead and potassium has been shown by Lorenz and Ruckstuhl, who have examined the freezing-point curve of a fused mixture of the two salts. Thus by a maximum at 430° C. and 33.3 mol. per cent, of potassium chloride, and breaks at 440° C. and 480° C. with 60 mol. and 68 mol. per cent, respectively of potassium chloride, the existence of the following double salts is indicated: 2PbCl2.KCl, which forms an almost transparent, glassy mass; PbCl2.2KCl, which occurs in rhombic crystals; and PbCl2.4KCl, which is said to form reddish white, granular masses. The behaviour of a fused mixture of potassium and lead chlorides on electrolysis shows that a complex anion is present.

The following crystallised double chlorides have been obtained from mixed aqueous solutions of their component salts:

3(PbCl2.KCl).H2O; 2PbCl2.RbCl; PbCl2.4CsCl; 2PbCl2.NH4Cl; PbCl2.2RbCl.H2O; PbCl2. 3TlCl; PbCl2.2NH4Cl; 2PbCl2.CsCl; PbCl2.2MgCl2.13H2O; 3(PbCl2.NH4Cl).H2O; PbCl2.CsCl; PbCl2.BaCl2;

According to Foote and Levy, only one lead ammonium chloride, viz. 2PbCl2.NH4Cl, exists. Equilibria in the system water-ammonium chloride-lead chloride have been studied by Bronsted.

Two compounds of lead chloride with ammonium bromide have been described; they are 2PbCl2.NH4Br and PbCl2.2NH4Br. Lead chloride forms with pyridine the substance PbCl2.2C5H5N, which crystallises in needles, and rapidly loses pyridine in the air.


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