Sentence Examples


  • It is an indigo-blue powder, soluble in hydrochloric acid, but insoluble in dilute nitric and sulphuric acids.
  • It is thus obtained as an olive green precipitate which is insoluble in acids and alkalis.
  • The cobaltous salts are formed when the metal, cobaltous oxide, hydroxide or carbonate, are dissolved in acids, or, in the case of the insoluble salts, by precipitation.
  • The insoluble salts are rose-red or violet in colour.
  • It is insoluble in dilute acids, but is readily soluble in excess of potassium cyanide.

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