File:DSC01977 - Magnesium (II) reactions.JPG
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Summary[edit]
DescriptionDSC01977 - Magnesium (II) reactions.JPG |
English: Reactions with Magnesium(II)-nitrate. From left to right:
With NaOH: Mg2+ + 2OH- -> Mg(OH)2(s) (insoluble in surplus) With NH3: Mg(NO3)2 + 2NH3 + 2H2O -> Mg(OH)2 + 2NH4+ Mg(OH)2 + 2NH4+ + 4H2O <-> [Mg(H2O)6]2+ + 2NH3; [Mg(H2O)6]2+ + NH3 -> [Mg(H2O)5(NH3)]2+ + H2O (In surplus this will form a soluble complex. In the glass you see the clear Mg(NO3)2 solution below, above NH3 was dropped in; in the middle where the two phases meet you see a ring of Mg(OH)2.) With Na2CO3: Mg2+ + (CO3)2- -> MgCO3(s); Mg2+ + 2OH- -> Mg(OH)2(s) (Both reactions will occur as soda is acting alkaline in water. The end product is a white mix of Mg(OH)2 and MgCO3.Deutsch: Reaktionen mit Magnesium(II)nitrat. Von links nach rechts:
Mit NaOH: Mg2+ + 2OH- -> Mg(OH)2(s) (unlöslich in Überschuss) Mit NH3: Mg(NO3)2 + 2NH3 + 2H2O -> Mg(OH)2 + 2NH4+ Mg(OH)2 + 2NH4+ + 4H2O <-> [Mg(H2O)6]2+ + 2NH3; [Mg(H2O)6]2+ + NH3 -> [Mg(H2O)5(NH3)]2+ + H2O (Im Überschuss bildet sich ein löslicher Komplex. Im Reagenzglas ist unten die klare Mg(NO3)2-Lösung zu sehen, darauf wurde NH3 getropft; an der Phasengrenze sieht man einen Ring von Mg(OH)2.) Mit Na2CO3: Mg2+ + (CO3)2- -> MgCO3(s); Mg2+ + 2OH- -> Mg(OH)2(s) (Beide Reaktionen finden nebeneinander statt, da Soda im Wasser alkalisch reagiert. Das Endprodukt ist eine Mischung der beiden weißen Salze Mg(OH)2 und MgCO3. |
Date | |
Source | Own work |
Author | Tubifex |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:01, 21 December 2009 | 1,200 × 1,512 (481 KB) | Tubifex (talk | contribs) | {{Information |Description={{en|1=Reactions with Magnesium(II)-nitrate. From left to right: With NaOH: Mg2+ + 2OH- -> Mg(OH)2(s) (insoluble in surplus) With NH3: Mg(NO3)2 + 2NH3 + 2H2O -> Mg(OH)2 + 2NH4+ Mg(OH)2 + 2NH4+ + 4H2O <-> [Mg(H2O)6]2+ + 2NH3; [ |
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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 | 160 |
Date and time of data generation | 13:59, 14 December 2009 |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Windows |
File change date and time | 15:26, 21 December 2009 |
Y and C positioning | Co-sited |
Exif version | 2.2 |
Date and time of digitizing | 13:59, 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 |