Main page (Russian)
Search in database (English)
Properties of substance:
magnesium hydroxide
Group of substances:
inorganic
Physical appearance:
colorless trigonal crystals
Empirical formula (Hill's system for organic substances):
H
2
MgO
2
Structural formula as text:
Mg(OH)2
Molar/atomic mass: 58.32
Decomposition temperature (°C):
480
Solubility (g/100 g of solvent):
water
: 0.00064 (25°C) [
Ref.
]
water
: 0.004 (100°C) [
Ref.
]
Multicomponent solubility (in wt%):
water 64.18%, magnesium hydroxide 0.07%, magnesium chloride 35.75%, 25 °C, separating phase:
MgCl2 * 6H2O
[
Ref.
]
water 65.87%, magnesium hydroxide 0.12%, magnesium chloride 34.01%, 25 °C, separating phase: MgCl2 * 3Mg(OH)2 * 8H2O [
Ref.
]
water 67.52%, magnesium hydroxide 0.39%, magnesium chloride 32.09%, 25 °C, separating phase: MgCl2 * 3Mg(OH)2 * 8H2O [
Ref.
]
Density:
2.4 (20°C, g/cm
3
)
Dissociation:
pK
b
(2) = 2.6 (25°C, water)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-924.7 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-833.7 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
63.14 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
77.03 (s)
References:
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 982-983
Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 118 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 77 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 234 [Russian]
Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 309 [Russian]
What information do you need?
© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru