TRbtain unknown mixture from the Teaching Assistant and write down the unknown n
ID: 529777 • Letter: T
Question
TRbtain unknown mixture from the Teaching Assistant and write down the unknown number in your notebook. Dissolve mixture in 30 ml t-butyl methyl ether in a small beaker and transfer this solution to your separatory funne Add 5 ml of water and note which layer is organ and which is aqueous Then add 10 mL ie the funnel and 1 aqueous solution of sodium bicarbonate to the funnel. Stopper immediately. invert the funnel PRESSURE WILL BUILD UP. Vent the liberated carbon dioxide again Ther re-stopper the funnel and shake it a once or twice. Vent the funnel again. Then shake more vigorously venting frequently. Allow the layers to separate completely and drain the lower layer into 50-mL beaker or Erlen this as 1 what does this layer contain? Wou a Add 10 mL of 1.5 M ueous sodium hydroxide to the separatory funnel. shake the mixture thoroughly allow the Tayers to separate, and drain the Tower aqueous layer into a small 25 or 50 ml beaker or Erlenmeyer flask. Label this as Flask 2. Add an additional 5 water to the organic layer in the separatory funnel shake the mixture as before and add the bottom aqueous layer to Flask 2. (What does this layer contain?Explanation / Answer
when you dissolved the 3.0 g of mixture in 30 ml of t-butyl methyl ether and 5 ml of water was added, the upper layer in the separatory funnel was organic and lower aqueous. 10 ml of 3 m aqueous solution of sodium bicarbonate was added to funnel, shaking followed by removing lower layer in flask 1 which contain sodium salt of acid.
10 ml 1.5 M aqueous sodium hydroxide was added to separatory funnel, shaked, separated into flask 2. 5 ml of water added to organic layer, shaked separated into flask 2 which contain rest of sodium salt of acid.
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