1. What are the advantages and disadvantages of using MTBE as the extracting solvent?

2. What is the practical advantage of having the organic solvent more dense than water when extracting an organic compound from an aqueous solution?

3. Why should an Erlenmeyer flask be placed under the separatory funnel before anything is added through the top?

4. Why is an Erlenmeyer flask used instead of a beaker?

5. Why is it important to collect each layer from the extraction in a separate Erlenmeyer flask?

6. Why must the stopper at the top of the separatory funnel be removed before any liquid is drawn out through the stopcock?

7. Why is the ether poured out of the top of the separatory funnel rather that run out through the tap?

8. The solubility of suberic acid in water is 0.14 g/100mL and in ether is 0.56 g/100mL.

a/ Calculate K_Dfor suberic acid.

b/ Calculate the volume of ether required to remove 90% of the suberic acid from 100mL of an aqueous saturated solution in a single extraction?