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| | SILVER CHROMATE Basic information |
| | SILVER CHROMATE Chemical Properties |
| density | 5.625 g/mL at 25 °C (lit.) | | form | Powder | | Specific Gravity | 5.625 | | color | Red-brown | | Water Solubility | Slightly soluble in water. Soluble in HNO<sub>3</sub> and ammonia | | Sensitive | Light Sensitive | | Merck | 14,8510 | | Solubility Product Constant (Ksp) | pKsp: 11.95 | | Exposure limits | OSHA: Ceiling 0.1 mg/m3
NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3 | | Stability: | Stable. but light-sensitive and hygroscopic. | | CAS DataBase Reference | 7784-01-2(CAS DataBase Reference) | | EPA Substance Registry System | Chromic acid (H2CrO4), disilver(1+) salt (7784-01-2) |
| Provider | Language |
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ALFA
| English |
| | SILVER CHROMATE Usage And Synthesis |
| Chemical Properties | crystalline powder | | Physical properties | Red monoclinic crystals or brownish-red powder; density 5.625 g/cm3; insoluble in water; soluble in nitric acid, ammonia and solutions of alkali cyanides and chromates. | | Uses | Catalyst for formation of aldol from alcohol; formed at end point of Mohr titration of halides. | | Preparation | Silver chromate is prepared by slowly adding a solution of potassium chromate to a solution of silver nitrate:
2Ag+ (aq) + Cr4O2- (aq) → Ag2CrO4 (s)
The precipitate is washed with hot water. | | Purification Methods | Wash the red-brown powder with H2O, dry it in a vacuum, then powder well and dry again in a vacuum at 90o/5hours. Its solubility in H2O is 0.0014% at 10o. Store it in the dark. [Cardillo & Shimizu J Org Chem 42 4268 1977.] |
| | SILVER CHROMATE Preparation Products And Raw materials |
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