Difference between revisions of "Sodium ethoxide"
| (5 intermediate revisions by the same user 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 = | ||
| Line 87: | Line 88: | ||
}} | }} | ||
| Section6 = {{Chembox Hazards | | Section6 = {{Chembox Hazards | ||
| − | | AutoignitionPt = | + | | 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] | ||
| 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== | ||
| − | + | 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== | ||
Latest revision as of 18:40, 12 July 2019
| 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.
Contents
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
- Articles containing unverified chemical infoboxes
- Chembox articles without image
- Chemical compounds
- Organic compounds
- Sodium compounds
- Alkoxides
- Ethoxides
- Bases
- Superbases
- Materials that react with water
- Materials unstable in acidic solution
- Materials unstable in basic solution
- Corrosive chemicals
- Air-sensitive materials
