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Hydrated chromium(III) sulfate, Cr 2 (SO 4) 3 ·15(H 2 O), (CAS #10031-37-5) is a green solid that also readily dissolves in water. It is obtained by heating the 18-hydrate material above 70 °C. Further heating yields the anhydrous sulfate. A variety of other chromium(III) sulfates are known, but also contain hydroxide or oxide ligands.
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.
Substance Formula 0 °C 10 °C 20 °C 30 °C 40 °C 50 °C 60 °C 70 °C 80 °C 90 °C 100 °C Barium acetate: Ba(C 2 H 3 O 2) 2: 58.8: 62: 72: 75: 78.5: 77: 75
Commercially available chromium(III) chloride hydrate is the dark green complex [CrCl 2 (H 2 O) 4]Cl. Closely related compounds are the pale green [CrCl(H 2 O) 5]Cl 2 and violet [Cr(H 2 O) 6]Cl 3. If anhydrous violet [10] chromium(III) chloride is dissolved in water, the violet solution turns green after some time as the chloride in the inner ...
Alternatively and less commonly, ferrochromium alloys can be dissolved in sulfuric acid and, after precipitation of the ferrous sulfate, the chrome alum crystallizes upon addition of potassium sulfate. Chromium alum crystallizes in regular octahedra with flattened corners and is very soluble in water. The solution reddens litmus and is an ...
For 2 1/2 cups, or 6 to 8 servings, you’ll need: 8 ounces cream cheese, room temperature. 4 to 6 ounces hot smoked salmon, flaked. 3 green onions, chopped, whites and dark greens divided.
Example of a dissolved solid (left) Formation of crystals in a 4.2 M ammonium sulfate solution. The solution was initially prepared at 20 °C and then stored for 2 days at 4 °C. In chemistry, solubility is the ability of a substance, the solute, to form a solution with another substance, the solvent.
After a year filled with animated inner emotions, mutants, aliens, gladiators and witches, the new year will bring a crop of new (or, newly revisited) movies to choose from, as always.