File:DSC01971 - Cobalt (II) reactions.JPG
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DescriptionDSC01971 - Cobalt (II) reactions.JPG |
English: Reactions with Cobalt (II) nitrate. From left to right:
Pure solution of Cobalt (II) nitrate. It is a very pale pink solution. With (NH4)2S: Co2+ + S2- -> CoS(s) (The black solid is first soluble in acid, but will react over Co(OH)S to Co2S3 when on air. This product is persistent to acid.) With NaOH: Co2+ + OH- -> (in cold:) blue alkaline salts of varying composition; (in hot or in NaOH surplus:) Co(OH)2 (rose red to brownish; this is the more stable form) With Na2CO3: Co2+ + (CO3)2- -> blue carbonate salts of varying composition (Will become that brown Co(OH)2 in surplus, too.)Deutsch: Reaktionen mit Cobalt(II)-Nitrate. Von links nach rechts:
Reine Lösung des Cobalt(II)-Nitrat. Die Lösung ist sehr schwach rosa. Mit (NH4)2S: Co2+ + S2- -> CoS(s) (Der schwarze Niederschlag ist frisch gefällt löslich in Säure, reagiert an der Luft aber weiter über Co(OH)S zu Co2S3. Das Endprodukt ist dann säurebeständig.) Mit NaOH: Co2+ + OH- -> (in der Kälte:) blaue alkalische Salze wechselnder Zusammensetzung; (in der Hitze oder im NaOH-Überschuss:) Co(OH)2 (rosarot bis braun, dies ist die stabilere der beiden Formen.) Mit Na2CO3: Co2+ + (CO3)2- -> blaue Carbonate wechselnder Zusammensetzung (Im Überschuss wird man auch hier Co(OH)2 erhalten.) |
Date | |
Source | Own work |
Author | Tubifex |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:03, 21 December 2009 | 952 × 1,536 (441 KB) | Tubifex (talk | contribs) | {{Information |Description={{en|1=Reactions with Cobalt (II) nitrate. From left to right: Pure solution of Cobalt (II) nitrate. It is a very pale pink solution. With (NH4)2S: Co2+ + S2- -> CoS(s) (The black solid is first soluble in acid, but will react |
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Camera manufacturer | Sony Ericsson |
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Camera model | K800i |
Exposure time | 1/30 sec (0.033333333333333) |
F-number | f/2.8 |
ISO speed rating | 125 |
Date and time of data generation | 12:49, 14 December 2009 |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Windows |
File change date and time | 14:39, 21 December 2009 |
Y and C positioning | Co-sited |
Exif version | 2.2 |
Date and time of digitizing | 12:49, 14 December 2009 |
APEX exposure bias | 0 |
Metering mode | Center weighted average |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Color space | sRGB |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Scene capture type | Standard |
Subject distance range | Macro |