Difference between revisions of "Sodium ethoxide"

From Sciencemadness Wiki
Jump to: navigation, search
(Created page with "{{Chembox | Name = Sodium ethoxide | Reference = | IUPACName = Sodium ethoxide | PIN = | SystematicName = | OtherNames = Ethoxysodium<br>Sodium ethylate <!-- Images --> | I...")
 
 
(9 intermediate revisions by 2 users not shown)
Line 61: Line 61:
 
| MeltingPt_ref =  
 
| MeltingPt_ref =  
 
| MeltingPt_notes =  
 
| MeltingPt_notes =  
 +
| Odor = Odorless (pure)<br>Alcoholic (hydrolyzed)
 
| pKa = 15.5
 
| pKa = 15.5
 
| pKb =  
 
| pKb =  
 
| Solubility = Reacts
 
| Solubility = Reacts
| SolubleOther = Soluble in [[ethanol]], [[methanol]]
+
| SolubleOther = Reacts with [[carboxylic acid]]s<br>Soluble in [[ethanol]], [[methanol]]
 
| Solvent =  
 
| Solvent =  
| VaporPressure =  
+
| VaporPressure = 0.75 mmHg (20 °C)
 
   }}
 
   }}
 
| Section3 = {{Chembox Structure
 
| Section3 = {{Chembox Structure
Line 87: Line 88:
 
   }}
 
   }}
 
| Section6 = {{Chembox Hazards
 
| Section6 = {{Chembox Hazards
| AutoignitionPt = Colorless crystalline solid
+
| AutoignitionPt =  
 
| ExploLimits =  
 
| ExploLimits =  
 
| ExternalMSDS = [https://www.docdroid.net/V86D92r/sodium-ethoxide-sa.pdf.html Sigma-Aldrich]
 
| ExternalMSDS = [https://www.docdroid.net/V86D92r/sodium-ethoxide-sa.pdf.html Sigma-Aldrich]
| FlashPt =  
+
| FlashPt = 30 °C (closed cup)
 
| LD50 =  
 
| LD50 =  
 
| LC50 =  
 
| LC50 =  
Line 107: Line 108:
 
   }}
 
   }}
 
}}
 
}}
'''Sodium ethoxide''' ('''C<sub>2</sub>H<sub>5</sub>ONa''') is a white to yellowish powder, which readily hydrolyzes in water.
+
'''Sodium ethoxide''' ('''C<sub>2</sub>H<sub>5</sub>ONa''') is a white to yellowish powder, which readily hydrolyzes in water and moist air.
  
 
==Properties==
 
==Properties==
Line 117: Line 118:
  
 
==Availability==
 
==Availability==
It is sold by chemical suppliers.
+
Sodium ethoxide is sold by chemical suppliers.
  
 
==Preparation==
 
==Preparation==
Sodium ethoxide can be prepared by adding [[sodium]] metal to anhydrous [[ethanol]].
+
Sodium ethoxide can be prepared by adding [[sodium]] metal to anhydrous [[ethanol]]. Cooling the solution will cause the compound the crystallize. Do this reaction in a dry atmosphere, to limit hydrolysis.
  
 
==Projects==
 
==Projects==
Line 133: Line 134:
  
 
===Disposal===
 
===Disposal===
Sodium ethoxide can be neutralized by dissolving it in large amounts of water slowly, then neutralize the resulting sodium hydroxide.  
+
Sodium ethoxide can be neutralized by dissolving it in large amounts of water slowly, then neutralize the resulting sodium hydroxide. Sodium bicarbonate can be used.
  
 
==References==
 
==References==
Line 149: Line 150:
 
[[Category:Ethoxides]]
 
[[Category:Ethoxides]]
 
[[Category:Bases]]
 
[[Category:Bases]]
 +
[[Category:Superbases]]
 
[[Category:Materials that react with water]]
 
[[Category:Materials that react with water]]
 
[[Category:Materials unstable in acidic solution]]
 
[[Category:Materials unstable in acidic solution]]
 
[[Category:Materials unstable in basic solution]]
 
[[Category:Materials unstable in basic solution]]
 
[[Category:Corrosive chemicals]]
 
[[Category:Corrosive chemicals]]
 +
[[Category:Air-sensitive materials]]

Latest revision as of 18:40, 12 July 2019

Sodium ethoxide
Names
IUPAC name
Sodium ethoxide
Other names
Ethoxysodium
Sodium ethylate
Properties
C2H5ONa
Molar mass 68.05 g/mol
Appearance White crystalline solid
Odor Odorless (pure)
Alcoholic (hydrolyzed)
Density 0.868 g/cm3 (of a 21 wt% solution in ethanol)
Melting point 260 °C (500 °F; 533 K)
Boiling point Decomposes
Reacts
Solubility Reacts with carboxylic acids
Soluble in ethanol, methanol
Vapor pressure 0.75 mmHg (20 °C)
Acidity (pKa) 15.5
Hazards
Safety data sheet Sigma-Aldrich
Flash point 30 °C (closed cup)
Related compounds
Related compounds
Sodium methoxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Sodium ethoxide (C2H5ONa) is a white to yellowish powder, which readily hydrolyzes in water and moist air.

Properties

Chemical

Sodium ethoxide readily hydrolyzes in contact with water, releasing lots of heat.

Physical

Sodium ethoxide is a colorless solid, which reacts with water.

Availability

Sodium ethoxide is sold by chemical suppliers.

Preparation

Sodium ethoxide can be prepared by adding sodium metal to anhydrous ethanol. Cooling the solution will cause the compound the crystallize. Do this reaction in a dry atmosphere, to limit hydrolysis.

Projects

  • Make esters

Handling

Safety

Sodium ethoxide is caustic and contact with skin will cause chemical burns. Reaction with water will give ethanol and lots of heat, which may ignite the alcohol vapors.

Storage

Sodium ethoxide should be stored in air-tight containers, or in a desiccator. Schlenk flasks are a good choice.

Disposal

Sodium ethoxide can be neutralized by dissolving it in large amounts of water slowly, then neutralize the resulting sodium hydroxide. Sodium bicarbonate can be used.

References

Relevant Sciencemadness threads