Search results
Results from the WOW.Com Content Network
Potassium dichromate, Chromic acid, (K2CrO4), dipotassium salt. Identifiers CAS Number. ... Molar mass: 194.189 g·mol −1 Appearance Yellow powder Odor: odorless
Potassium dichromate, K 2 Cr 2 O 7, is a common inorganic chemical reagent, most commonly used as an oxidizing agent in various laboratory and industrial applications. As with all hexavalent chromium compounds, it is acutely and chronically harmful to health.
Predominance diagram for chromate. In aqueous solution, chromate and dichromate anions exist in a chemical equilibrium.. 2 CrO 2− 4 + 2 H + ⇌ Cr 2 O 2− 7 + H 2 O. The predominance diagram shows that the position of the equilibrium depends on both pH and the analytical concentration of chromium.
The following other wikis use this file: Usage on ar.wikipedia.org كرومات البوتاسيوم; كبريتات البوتاسيوم; Usage on azb.wikipedia.org
Molar mass: 174,5472 g/mol Appearance orange solid Density: 2.5228 g/cm 3: Solubility in water. Soluble [vague] Hazards Occupational safety and health (OHS/OSH):
Molar mass: 161.97 g/mol Appearance yellow crystals Odor: odorless Density: 2.698 g/cm 3: Melting point: 792 °C (1,458 °F; 1,065 K) (anhydrous) 20 °C (decahydrate)
The molar mass of atoms of an element is given by the relative atomic mass of the element multiplied by the molar mass constant, M u ≈ 1.000 000 × 10 −3 kg/mol ≈ 1 g/mol. For normal samples from Earth with typical isotope composition, the atomic weight can be approximated by the standard atomic weight [ 2 ] or the conventional atomic weight.
Potassium perchlorate in crystal form. Potassium perchlorate is prepared industrially by treating an aqueous solution of sodium perchlorate with potassium chloride.This single precipitation reaction exploits the low solubility of KClO 4, which is about 1/100 as much as the solubility of NaClO 4 (209.6 g/100 mL at 25 °C).