Molybdates, Tungstates, and Related Compounds

A number of peroxychromate derivatives have been made, the most familiar being the blue, ether-soluble compound, Cr05, resulting from treatment of acidified dichromate solutions with HjO . These have peroxide bridges —that is, three-membered rings formed by a chromium 

If a basic solution of molybdate or tungstate is gradually acidified, the 

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