-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
Mercurous compounds with oxidation number +1 all form a dimer Hg 2 2+ , which is consistent with the diamagnetism of mercurous compounds
.
The halides of mercurous are all linear structures (X-Hg-Hg-X), Hg adopts sp hybridization, Hg 2 Cl 2 (white), Hg 2 Br 2 (white) and Hg 2 I 2 (yellow) are all It is hard to dissolve in water, and the solubility decreases successively, and all are easy to sublimate
.
Mercurous chloride Hg 2 Cl 2 is commonly known as calomel due to its slightly sweet taste and is often used to make calomel electrodes
.
Hg 2 Cl 2 should be stored in a brown bottle to prevent decomposition when exposed to light
Hg 2 Cl 2 =HgCl 2 +Hg
Hg 2 (NO 3 ) 2 is an ionic compound, which is highly soluble in water, but is partially hydrolyzed to generate Hg 2 (OH)NO 3.
Dilute nitric acid can be added to inhibit hydrolysis
.
Hg 2 (NO 3 ) 2 and Hg 2 Cl 2 react with ammonia to disproportionately react to produce white amino compounds and black extremely dispersed elemental mercury, but the black covering ability is strong, so the reaction product is dark gray
.
Hg 2 2+ is stable in acid, but disproportionation occurs in alkali
.
Hg 2 2+ + 2OH - = HgO + Hg + H 2 O
The KI solution is added to the Hg 2 (NO 3 ) 2 solution, and a yellow Hg 2 I 2 precipitate is formed first.
If KI is excessive, the Hg 2 I 2 will undergo a disproportionation reaction
Hg 2 SO 4 is a slightly soluble compound (K sp Θ =6.
5×10 -5 )
