Ga2(SO4)3 - GALLIUM (III) SULPHATE

Properties of gallium (III) sulphate:

White, decomposes when heated. It is readily soluble in water (hydrolysis on cation) and sulfuric acid. It reacts with bases, ammonium hydroxide. It forms a double salt - alum.


Molar mass g/mol 427.63

Methods for preparation of gallium (III) sulphate:

Ga2O3 + 6NaHSO4 = Ga2(SO4)3 + 3Na2SO4 + 3H2O (350-400° C).


Chemical reactions with gallium (III) sulphate:

2Ga2(SO4)3 = 2Ga2O3 + 6SO2 + 3O2 (520-700° C).

Ga2(SO4)3 • 18H2O = Ga2(SO4)3 + 18H2O (40-360° C, vacuum).

Ga2(SO4)3(diluted) + 12H2O = 2[Ga(H2O)6](3+) + 3SO4(2-) (pH < 7).

Ga2(SO4)3 + 6NaOH(diluted) = 2Ga(OH)3↓ + 3Na2SO4,

Ga2(SO4)3 + 8NaOH(conc., hot) = 2Na[Ga(OH)4] + 3Na2SO4.

Ga2(SO4)3 + 6(NH3 • H2O)[diluted] = 2Ga(OH)3↓ + 3(NH4)2SO4,

Ga2(SO4)3 + 8(NH3 • H2O)[conc., cold] = 2NH4[Ga(OH)4] + 3(NH4)2SO4.

Ga2(SO4)3 + M2SO4 + 24H2O = 2{MGa(SO4)2 • 12H2O}↓ (M = K(+), Rb(+), Cs(+), NH(+4)).
 

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