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C2510 EAS Lab F 2012b

Note any changes to the contents of the flask in your

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Unformatted text preview: s to the contents of the flask in your laboratory notebook. While the reaction is running, add about 15 mL of ethanol to a 100-mL beaker and place it in another ice bath. Also, add about 100 mL of deionized water to a 250-mL beaker and place it in the ice bath with the ethanol. You will use these later and they need to be icecold. When all of the concentrated sulfuric acid has been added to the Erlenmeyer flask, remove the flask from the crystallizing dish and place it directly on the stir plate. Allow the reaction to stir for 20 minutes. While the reaction is stirring, carefully clean your separatory funnel and graduated cylinders. Rinse them with 10% sodium bicarbonate (caution: carbon dioxide is evolved) and then with deionized water. Recall that any drops on your bench could be sulfuric acid. Take a moment to wipe down your bench with a small amount of 10% sodium bicarbonate followed by a wet paper towel or sponge. Set up your Büchner funnel and filter flask for vacuum filtration. After the rea...
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