Sentence Examples


  • They are precipitated from their alkaline solutions as cobalt sulphide by sulphuretted hydrogen, but this precipitation is prevented by the presence of citric and tartaric acids; similarly the presence of ammonium salts hinders their precipitation by caustic alkalis.
  • By dry distillation it gives ammonium cyanide.
  • The residue from the ammonium sulphide solution is warmed with dilute nitric acid.
  • It may be obtained in the spongy form by igniting iridium ammonium chloride, and this variety of the metal readily oxidizes when heated in air.
  • Similar sodium and ammonium compounds are known.