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Properties of substance:
potassium bromate
Group of substances:
inorganic
Physical appearance:
colorless trigonal crystals
Empirical formula (Hill's system for organic substances):
BrKO
3
Structural formula as text:
KBrO3
Molar/atomic mass: 167
Decomposition temperature (°C):
370
CAS №: 7758-01-2
Solubility (g/100 g of solvent):
acetone
: insoluble [
Ref.
]
ammonia liquid
: 0.002 (25°C) [
Ref.
]
deuterium oxide
: 6.66 (25°C) [
Ref.
]
ethanol
: 0.0017 (15°C) [
Ref.
]
ethyl acetate
: insoluble [
Ref.
]
water
: 3.05 (0°C) [
Ref.
]
water
: 4.72 (10°C) [
Ref.
]
water
: 6.87 (20°C) [
Ref.
]
water
: 8.15 (25°C) [
Ref.
]
water
: 9.64 (30°C) [
Ref.
]
water
: 13.25 (40°C) [
Ref.
]
water
: 22.27 (60°C) [
Ref.
]
water
: 34.28 (80°C) [
Ref.
]
water
: 50 (100°C) [
Ref.
]
Density:
3.27 (17.5°C, g/cm
3
)
Reactions:
[
Ref.1
]
BaCl
2
* 2H
2
O + 2KBrO
3
→ Ba(BrO
3
)
2
* H
2
O + 2KCl + H
2
O
Electrode potential:
BrO
3
-
+ 3H
2
O + 6e
-
→ Br
-
+ 6OH
-
, E = 0.61 V (water, 25°C)
BrO
3
-
+ 6H
+
+ 6e
-
→ Br
-
+ 3H
2
O, E = 1.44 V (water, 25°C)
BrO
3
-
+ 5H
+
+ 4e
-
→ HBrO + 2H
2
O, E = 1.49 V (water, 25°C)
2BrO
3
-
+ 12H
+
+ 10e
-
→ Br
2
+ 6H
2
O, E = 1.52 V (water, 25°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-332.2 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-243.5 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
149.2 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
104.9 (s)
Enthalpy (heat) of solution Δ
sol
H (kJ)
41.7 (s) [solvent: water, 18°C, 1 mol in 400 mol of water] [
Ref.
]
References:
Armarego W. L. F. Purification of Laboratory Chemicals. - 7ed. - 2013. - pp. 599
Bretherick's Handbook of Reactive Chemical Hazards. - 6 ed., Vol. 1. - Butterworth-Heinemann, 1999. - pp. 101-102
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 697-699
Stern K.H. High temperature properties and thermal decomposition of inorganic salts with oxyanions. - CRC Press, 2001. - pp. 242
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 67-68 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 80-81 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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