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Experiment: To prepare a sample of ethanal
| Equipment: | Agents: |
| Clamp Stand | Sodium dichromate |
| Tripod stand | Sulphuric acid |
| Wire gauze | Ethanol |
| Conical Flask |
| Liebig Condenser |
| Thistle Funnel |
| Pear shaped flask |
| Bunsen Burner |
| Clips |
| Safety Goggles |
Method:
- Prepare a solution of 10g of sodium dichromate in 20cm3 of water and place in the pear shaped flask.
- Set up apparatus as shown.
- CAREFULLY mix 5cm3 of concentrated sulphuric acid with 10cm3 of ethanol in a small conical flask. This reaction is severely exothermic (i.e. Gives off heat), cool as required. Place in the thistle funnel.
- Heat the pear shaped flask until the dichromate solution is ALMOST boiling and remove the bunsen burner. Add the acidified ethanol drop by drop.
- Distil the resulting vapour off until about 10 cm3 has been collected. By now practically all of the ethanal will have been distilled off.
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