Chemical elements
  Lanthanum
    Isotopes
    Energy
    Production
    Application
    Chemical properties
      Lanthanum chloride
      Lanthanum iodide
      Lanthanum perchlorate
      Lanthanum bromate
      Lanthanum iodate
      Lanthanum periodate
      Lanthanum sesquioxide
      Lanthana
      Lanthanum hydroxide
      Lanthanum peroxide
      Lanthanum persulphide
      Lanthanum sulphate
      Lanthanum dithionate
      Lanthanum selenite
      Lanthanum selenate
      Lanthanum chromate
      Lanthanum azide
      Lanthanum hydrazoate
      Lanthanum trinitride
      Lanthanum nitrate
      Lanthanum phosphite
      Lanthanum orthophosphate
      Lanthanum hydrogen pyrophosphate
      Lanthanum metaphosphate
      Lanthanum arsenates
      Lanthanum carbonate
      Lanthanum thiocyanate
      Lanthanum platinocyanide
      Lanthanum acetate
      Lanthanum oxalate
    PDB 1djg-2rpv

Lanthanum hydroxide, La(OH)3






Lanthanum hydroxide, La(OH)3, is produced by the direct union of lanthana and water, and may be obtained as a white, gelatinous precipitate by the addition of an excess of ammonia or alkali hydroxide to a solution of a lanthanum salt. The precipitate is sufficiently soluble in water to turn red litmus blue; it easily absorbs carbon dioxide from the air and sets free ammonia from ammonium salts. Lanthanum hydroxide is, in fact, the strongest base of all the rare earth hydroxides, being comparable with calcium hydroxide in its strength, and on this account the claim of Baskerville and Catlett to have prepared metallic lanthanates, in which lanthana acts as an acid, cannot be accepted until independent confirmation of their results is forthcoming.
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