Main page (Russian) Search in database (English)

Properties of substance:

aluminum hydroxide α-form

Synonyms:

aluminium hydroxide α-form

Group of substances:

inorganic

Physical appearance:

colorless monoclinic crystals

Empirical formula (Hill's system for organic substances):

H3AlO3

Structural formula as text:

Al(OH)3

Molar/atomic mass: 78.004

Decomposition temperature (°C):

150

Solubility (g/100 g of solvent):

water: insoluble [Ref.]

Reactions:

  1. [Ref.1aster]
    Al(OH)3 + 3KHC2O4 → K3[Al(C2O4)3]*3H2O
  2. [Ref.1aster]
    Al(OH)3 + 2CH3COOH → (CH3COO)2AlOH + 2H2O

Electrode potential:

Al(OH)3 + 3e- → Al + 3OH-, E = -2.31 V (water, 25°C)

Dissociation:

pKb (3) = 8.86 (25°C, water)
pKsp (0) = 32.3 (18°C, water)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-1315 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-1157 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

70.1 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

93.07 (s)

References:

  1. Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 231-233 [Russian]

    What information do you need?




    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru