Periodic table of elements

Calcium hydroxide [Ca(OH)2]

SOLUBILITY:
water [H2O]: 0,176 (0°), 0,17 (10°), 0,16 (20°), 0,155 (25°), 0,148 (30°), 0,137 (40°), 0,114 (60°), 0,092 (80°), 0,072 (100°), 0,035 (150°), 0,012 (200°)
ethanol [C2H5OH]: insoluble

PROPERTIES:
colourless hexagonal crystals
M (molar mass): 74,080 g/mol
ТDT (decomposing temperature): 580 °C
Decomp. to (names of the decomposition products): кальция оксид, вода
D (density): 2,34 (20°, g/cm3, s.)
ΔH°298 (Standard molar enthalpy of reaction at 298 К): -986,6 (s) kJ/mol
ΔG°298 (standard molar Gibbs energy of reaction at 298 К): -896,8 (s) kJ/mol
298 (standard molar entropy at 298 К): 76,1 (s) J/(mol•К)
p (standard molar heat capacity): 84,5 (s) J/(mol•К)
pSP (solubility product index): 5,26 (20°, water)
pKb2 (acid dissociation constant): 1,37 (25°, water)

LITERARY REFERENCES:
• Spravochnik po rastvorimosti. - T.1, Kn.1. - M.-L.: IAN SSSR, 1961. – P. 243-244
• Himicheskaya enciklopediya. - T.2. - M.: Sovetskaya enciklopediya, 1990. – P. 298
• Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1 - New York: D. Van Nostrand Company, 1940. – P. 309-318
• Rabinovich V.A., Havin Z.Ya. Kratkiy himicheskiy spravochnik. - L.: Himiya, 1977. – P. 71

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