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Magnesium chromate is a chemical compound, with the formula MgCrO 4. It is a yellow, odorless, water-soluble salt with several important industrial uses. It is a yellow, odorless, water-soluble salt with several important industrial uses.
The following chart shows the solubility of various ionic compounds in water at 1 atm pressure and room temperature (approx. 25 °C, 298.15 K). "Soluble" means the ionic compound doesn't precipitate, while "slightly soluble" and "insoluble" mean that a solid will precipitate; "slightly soluble" compounds like calcium sulfate may require heat to precipitate.
Magnesium perchlorate is a powerful oxidizing agent, with the formula Mg(ClO 4) 2. The salt is also a superior drying agent for gas analysis. Magnesium perchlorate decomposes at 250 °C. [2] The heat of formation is -568.90 kJ/mol. [3] The enthalpy of solution is quite high, so reactions are done in large amounts of water to dilute it.
3 O 2− 10, and tetrachromates, Cr 4 O 2− 13. [2] All polyoxyanions of chromium(VI) have structures made up of tetrahedral CrO 4 units sharing corners. [3] The hydrogen chromate ion, HCrO 4 −, is a weak acid: HCrO − 4 ⇌ CrO 2− 4 + H +; pK a ≈ 5.9. It is also in equilibrium with the dichromate ion: 2 HCrO − 4 ⇌ Cr 2 O 2− 7 + H 2 O
[Mg(H 2 O) 6] 2+ → [Mg(H 2 O) 5 (OH)] + + H 3 O + (decomposes in water) MgCl 2 ·nH 2 O → Mg(OH)Cl + HCl + (n-1)H 2 O (decomposes when heated) Magnesium chloride is an ionic compound, which can be electrolysed in a molten state to form magnesium and chlorine gas. The properties of magnesium bromide and magnesium iodide are similar.
K 2 Cr 2 O 7 (aq) + 2 KOH → 2 K 2 CrO 4 + H 2 O. Or, the fusion of potassium hydroxide and chromium trioxide: 2 KOH + CrO 3 → K 2 CrO 4 + H 2 O. In solution, the behavior of potassium and sodium dichromates are very similar. When treated with lead(II) nitrate, it gives an orange-yellow precipitate, lead(II) chromate.
The hexahydrate Mg(ClO 3) 2 ·6H 2 O decomposes to the tetrahydrate at 35 °C. At 65 °C, it dehydrates to the dihydrate, then at 80 °C forms a basic salt. If further heated to 120 °C it decomposes to water, oxygen, chlorine, and magnesium oxide. [2] As confirmed by X-ray crystallography, the di- and hexahydrates feature octahedral Mg 2 ...
Chromium dioxide or chromium(IV) oxide is an inorganic compound with the formula CrO 2. It is a black synthetic magnetic solid. [3] It once was widely used in magnetic tape emulsion. [4] With the increase in popularity of CDs and DVDs and more recently digital media, the use of chromium(IV) oxide has declined.