Atomistry » Uranium » Compounds » Uranous Hydroxide
Atomistry »
  Uranium »
    Compounds »
      Uranous Hydroxide »

Uranous Hydroxide

The addition of alkali to a solution of a uranous salt produces a reddish-brown gelatinous precipitate, which darkens in colour on boiling the solution. If dried in vacuo it becomes black and has the composition UO2.H2O. This rapidly oxidises in the air and readily dissolves in dilute acids, forming uranous salts. It acts upon a neutral solution of silver nitrate, first precipitating silver oxide and forming a green solution which, however, soon turns yellow, and the oxide is reduced to metallic silver as the uranyl salt forms in solution, thus:
  1. 4AgNO3 + UO2 = 2Ag2O + U(NO3)4,
  2. U(NO3)4 + 2Ag2O = UO2(NO3)2 + 2AgNO3 + 2Ag.
According to Aloy, a black crystalline hydrate, of composition UO2.2H2O, is obtained when crystallised uranous sulphate is treated with hot potassium or sodium hydroxide solution. The product, when thoroughly washed, remains stable in air for several days. It dissolves in dilute acids, yielding uranous salts. On heating, it is completely converted to the green oxide.

Last articles

Zn in 7O75
Zn in 7O73
Zn in 7O4I
Zn in 7O72
Zn in 7O4J
Zn in 7NVR
Zn in 7NVY
Zn in 7NVZ
Zn in 7NW0
Zn in 7O4K
© Copyright 2008-2020 by
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy