Sentence Examples

  • - Organic acids are characterized by the presence of the monovalent group - CO.
  • It is worthy of notice that while many metals dissolve in cold dilute sulphuric acid, with the liberation of hydrogen, in accordance with the typical equation: M -{- H 2 50 4 = MSO 4 -1H2 (M denoting one atom of divalent or two atoms of a monovalent metal), there are several (copper, mercury, antimony, tin, lead and silver) which are insoluble in the cold dilute acid, but dissolve in the hot strong acid with evolution of sulphur dioxide, thus: M -}- 2H 2 250 4 = MSO 4 SO 2 + 2H 2 0.
  • Sulphuric acid, being a dibasic acid, forms two series of salts with monovalent metals: an acid sulphate, Mhso 4, and a normal sulphate, M 2 50 4.
  • Thus we have salts of the following types M20(W03)n, where n=1, 2, 3, 4, 5, 6, 7, 8, and also (M20)m(W03)n, where m, n=2, 5; 3, 7; 4, 3; 5, 12; M standing for a monovalent metal.
  • Thallium forms two series of salts: thallous, in which the metal is monovalent; and thallic, in which it is trivalent.

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