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Potassium pyrosulphite

Potassium pyrosulphite, K2S205.—On treatment of a hot saturated solution of potassium carbonate with sulphur dioxide, the pyrosulphite separates in monoclinic crystals, which are more stable than those of the primary sulphite. Its heat of formation from the elements is 369-4 Cal.8 It is employed in the preparation of photographic developers under the name potassium metabisulphite. ... [Pg.173]

The decomposition of the alkali pyrosulphites under the influence of heat follows a very complicated course.1 At 150° C. the potassium salt yields trithionate and sulphate, the ionic reaction being ... [Pg.132]

See other pages where Potassium pyrosulphite is mentioned: [Pg.325]    [Pg.269]    [Pg.667]    [Pg.161]    [Pg.325]    [Pg.269]    [Pg.667]    [Pg.161]    [Pg.125]    [Pg.646]    [Pg.649]    [Pg.669]    [Pg.686]   
See also in sourсe #XX -- [ Pg.173 ]



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