Sodium Carbonate → Dichromium tricarbonate
Reaktionsgleichung
[C:1](=[O:4])([O-:3])[O-:2].[Na+].[Na+].[Cl-].[Cr+3:8].[Cl-].[Cl-]>>[C:1](=[O:2])([O-:4])[O-:3].[Cr+3:8].[C:1](=[O:2])([O-:4])[O-:3].[C:1](=[O:2])([O-:4])[O-:3].[Cr+3:8]Komponenten
3
Versuchsvorschrift
500 g of a 10% aqueous solution of sodium carbonate and 86.4 g of a 35% aqueous solution of chromium chloride (manufactured by Nippon Chemical Industrial Co., Ltd.) were each placed in a container and prepared. Next, the aqueous solution of sodium carbonate and the aqueous solution of chromium chloride were adjusted to a reaction temperature of 20° C. Unlike Example 1, the aqueous solution of sodium carbonate was added to the aqueous solution of chromium chloride at a speed of 10 g/min, while the aqueous solution of chromium chloride was stirred. The produced precipitate was filtered and washed with water to obtain a chromium (III) carbonate cake. This chromium (III) carbonate cake was dried in a vacuum at 40° C. for 48 hours to obtain a blue-green chromium (III) carbonate powder. Measurement as in Example 1 was performed for this chromium (III) carbonate. The results are shown in the following Table 3. However, the solubility was measured only immediately after the production.