infusible white precipitate

1 definition found

infusible white precipitate - Collaborative International Dictionary of English v.0.48 :

  Precipitate \Pre*cip"i*tate\, n. [NL. praecipitatum: cf. F.
     pr['e]cipit['e].] (Chem.)
     An insoluble substance separated from a solution in a
     concrete state by the action of some reagent added to the
     solution, or of some force, such as heat or cold. The
     precipitate may fall to the bottom (whence the name), may be
     diffused through the solution, or may float at or near the
     surface.
     [1913 Webster]
  
     2. atmospheric moisture condensed as rain or snow, etc.; same
        as precipitation[5].
        [PJC]
  
     Red precipitate (Old. Chem), mercuric oxide (HgO) a heavy
        red crystalline powder obtained by heating mercuric
        nitrate, or by heating mercury in the air. Prepared in the
        latter manner, it was the precipitate per se of the
        alchemists.
  
     White precipitate (Old Chem.)
        (a) A heavy white amorphous powder (NH2.HgCl) obtained
            by adding ammonia to a solution of mercuric chloride
            or corrosive sublimate; -- formerly called also
            infusible white precipitate, and now amido-mercuric  chloride
            .
        (b) A white crystalline substance obtained by adding a
            solution of corrosive sublimate to a solution of sal
            ammoniac (ammonium chloride); -- formerly called also
            fusible white precipitate.
            [1913 Webster]