Arsenous acid: Difference between revisions
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[[Image:Arsenous-acid-2D.png|thumb|right|200px|The structure of '''arsenous acid''']] |
[[Image:Arsenous-acid-2D.png|thumb|right|200px|The structure of '''arsenous acid''']] |
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[[Image:Arsenous-acid-3D-vdW.png|thumb|right|200px|A space-filling model of arsenous acid]] |
[[Image:Arsenous-acid-3D-vdW.png|thumb|right|200px|A space-filling model of arsenous acid]] |
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'''Arsenous acid''' is very arsy. It consists of atomic diarrhea, floaters and urine all mixed into one. |
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'''Arsenous acid''', also known as '''arsenious acid''', is the [[hydrolyzed]] form of [[arsenic trioxide]] and has the formula As(OH)<sub>3</sub>. As(OH)<sub>3</sub> occurs in aqueous [[solution]]s and has not been isolated as a pure material, although this fact does not detract from the significance of As(OH)<sub>3</sub>. |
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==Properties== |
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The [[molecular weight]] of arsenous acid, is 125.94 g/mol. As(OH)<sub>3</sub> is a pyramidal molecule consisting of three [[hydroxide|hydroxyl]] groups connected by single bonds to arsenic. The <sup>1</sup>H [[NMR]] spectrum of arsenous acid solutions consists of a single signal consistent with the molecule's high symmetry. In contrast, the nominally related [[phosphorus]] species H<sub>3</sub>PO<sub>3</sub> mainly adopts the structure HPO(OH)<sub>2</sub>; P(OH)<sub>3</sub> is a very minor equilibrium component of such solutions. The differing behaviors of the As and P compounds reflect a trend whereby high oxidation states are more stable for lighter members of main group elements than their heavier congeners. |
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==Properties==Arsenous acid can actually be either a solid or a liquid. When a solid it causes the pooer much distress to excrete his waste, and usually makes a soft plop when falling into toilet water. When a liquid can be used to kill the enemies via their water supply. |
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As(OH)<sub>3</sub> is a [[weak acid]] with a pK<sub>a</sub> of 9.2. |
As(OH)<sub>3</sub> is a [[weak acid]] with a pK<sub>a</sub> of 9.2. |
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==Reactions== |
==Reactions== |
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Well....reactions you say...It makes the pooer screme, and scream, and scream. And then a sigh....and a scream. And then a stink. And then a funeral. |
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The preparation of As(OH)<sub>3</sub> involves a slow [[hydrolysis]] of [[arsenic trioxide]] in water. Addition of [[base (chemistry)|base]] converts arsenous acid to the [[arsenite|arsenite ions]] [AsO(OH)<sub>2</sub>]<sup>-</sup>, [AsO<sub>2</sub>(OH)]<sup>-2</sup>, and [AsO<sub>3</sub>]<sup>-3</sup>. Reactions attributed to aqueous [[arsenic trioxide]] are due to arsenous acid and its conjugate bases. |
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==Toxicology==Totally toxic! Kill people via water supply or in brown food. |
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==Toxicology== |
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Arsenic containing compounds are highly toxic and [[carcinogenic]]. The [[anhydride]] form of arsenous acid, [[arsenic trioxide]], is used as a [[herbicide]], [[pesticide]], and [[rodenticide]]. |
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==Literary References== |
==Literary References==Identified floating in toilets! |
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Arsenious acid is identifed through the microscope as a "crystalline particle" by the fictitious [[Dr. Thorndyke]] following isolation from the grainy [[arrowroot]] breakfast of a concerned Mr. Barton in the Moabite Cypher case. |
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==References== |
==References== |
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Revision as of 08:37, 22 August 2008
Arsenous acid is very arsy. It consists of atomic diarrhea, floaters and urine all mixed into one.
==Properties==Arsenous acid can actually be either a solid or a liquid. When a solid it causes the pooer much distress to excrete his waste, and usually makes a soft plop when falling into toilet water. When a liquid can be used to kill the enemies via their water supply. As(OH)3 is a weak acid with a pKa of 9.2.
Reactions
Well....reactions you say...It makes the pooer screme, and scream, and scream. And then a sigh....and a scream. And then a stink. And then a funeral.
==Toxicology==Totally toxic! Kill people via water supply or in brown food.
==Literary References==Identified floating in toilets!
References
- Greenwood, N.N. (1997). Chemistry of the Elements. Oxford: Butterworth-Heinemann.
{{cite book}}: Unknown parameter|coauthors=ignored (|author=suggested) (help) - King, R. Bruce "(ed.)" (1994). Encyclopedia of Inorganic Chemistry. Chichester: John Wiley & Sons.
- Patnaik, Pradyot (2003). Handbook of Inorganic Chemicals. New York: McGraw Hill.
- "Arsenic trioxide".
{{cite web}}: Unknown parameter|accessmonthday=ignored (help); Unknown parameter|accessyear=ignored (|access-date=suggested) (help) - Freeman, R. Austin (1973). The Best Dr. Thorndyke Detective Stories. New York: Dover Publications, Inc.