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Chrome alum reduction

The dichromate ion oxidises iron(II) to iron(III), sulphite to sulphate ion, iodide ion to iodine and arsenic(III) to arsenic(V) (arsenate). Reduction of dichromate by sulphite can be used to prepare chrome alum, since, if sulphur dioxide is passed into potassium dichromate acidified with sulphuric acid, potassium and chromium(III) ions formed are in the correct ratio to form the alum, which appears on crystallisation ... [Pg.379]

Reduction of a dichrbmate in aqueous solution produces chromic ion, Cr+ + + (really the hexahydrated ion, [Cr(H20) ]+ + +), which has a violet color. The salts of this ion are similar in formula to those of aluminum. Chrome alum, KCr S04)2 12H20, forms large violet octa-hedra. [Pg.522]

Potassium Chromium Alum, Chrome Alum, KjSOj. Cr2(S04)3.24H20, first isolated by Mussin-Pusehin, is obtained by the reduction of a mixture of potassium dichromate and sulphuric acid by sulphurous acid, alcohol, oxalic acid, etc. ... [Pg.81]

Electrochemical reduction of chrome alum to chromium metal proceeds as follows ... [Pg.267]

See other pages where Chrome alum reduction is mentioned: [Pg.99]    [Pg.293]    [Pg.766]    [Pg.267]    [Pg.765]    [Pg.11]    [Pg.87]    [Pg.92]    [Pg.315]    [Pg.339]    [Pg.342]    [Pg.915]   
See also in sourсe #XX -- [ Pg.9 ]



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Electrochemical Reduction of Chrome Alum

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