Kal So4 2 Molar Mass

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Properties of substance:

potassium aluminium sulfate dodecahydrate

Synonyms:

aluminium potassium sulfate dodecahydrate

Grouping of substances:

inorganic

Concrete appearance:

colorless cubic crystals

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

H_ii _fourAlKO₁ ₆South

Structural formula as text:

KAl(SO4)2 * 12H2O

Molar/atomic mass: 474.38

Melting point (°C):

92.5

Decomposition temperature (°C):

120

Solubility (k/100 g of solvent):

ethanol: insoluble [Ref.]
h2o: iii (0°C) [Ref.]
water: four (ten°C) [Ref.]
water: five.9 (20°C) [Ref.]
water: vii.23 (25°C) [Ref.]
water: 8.39 (30°C) [Ref.]
water: xi.seven (forty°C) [Ref.]
water: 17 (50°C) [Ref.]
water: 24.75 (60°C) [Ref.]
h2o: 40 (70°C) [Ref.]
water: 71 (eighty°C) [Ref.]
water: 109 (90°C) [Ref.]
h2o: 119 (92.5°C) [Ref.]

Density:

1.75 (20°C, g/cm³)

Dissociation:

pK_a (i) = v.02 (25°C, water)

Standard molar enthalpy (rut) of formation Δ_fH (298 Grand, kJ/mol)

-6063 (due south) [Ref.]

Standard tooth Gibbs energy of formation Δ_f1000 (298 K, kJ/mol)

-5142 (s) [Ref.]

Standard tooth entropy Due south (298 One thousand, J/(mol·G))

687 (due south) [Ref.]

Enthalpy (heat) of solution Δ_solH (kJ)

42,31 (s) [solvent: water, 18°C, i mol in 1200 mol of water] [Ref.]

References:

�� .�., �� .�. �� , �� . - ��: �� , 2000. - pp. 78 [Russian]
�� .�., �� .�., �� .�. �� . - �.: ��, 2000. - pp. 85 [Russian]
�� .�., �� .�. �� . - �.: ��, 1977. - pp. 52 [Russian]
�� . - �.17: ��. - �.: ��+, 2004. - pp. 202 [Russian]
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