Question

Grignard Lab1. (2 pts.) Why are the ether layers washed using BRINE (a saturated solution of salt in water)

instead ofjust plain water?2. (2 pts.) Sodium sulfate is used to dry the ether solutions. What are the intermolecular forces that help thesodium sulfate to dry the ether?3. (2 pts.) Why do you place rubber septa on the reaction vessels for this synthesis?4. (2 pts.) Why do you keep the syringe stored with the needle inserted into a septum when it is not in usealways?5. (2 pts.) Why do you add the 6M hydrochloric acid to the reaction mixture from last week at the start of thisweeks’ lab?6. (2 pts.) Why do you hold the separatory funnel with the stopcock upwards when shaking?7. (2 pts.) Why do you hold the separatory funnel with 2 hands when shaking, particularly with the stopperresting in one of the hands (this is not a trick question, the answer is very basic and obvious)?8. (2 pts.) Petroleum ether is added before crystallizing the product. Characterize petroleum ether as polaror nonpolar and as protic or aprotic?

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