I'm new here so I'll introduce myself first. You can call me charlie or chemboy. I'm 19 and an sophomore at asu and i like chemistry... that's pretty much it :)
OK, i read the rules on posting and although I'm a noob, I'll try to not break the rules. In my lab class, we used 4-methylcyclohexanol to prepare an alkene. I working on some of the questions (we use the Pavia textbook if knows what that is) and there is a question that i am not sure about...
I attached a separation scheme that i made for this experiment so you know what we did.
The question was..
In this experiment, 1.0 mL of saturated NaCl is used to rinse the Hickmen head after the initial distillation. Why is saturated NaCl, rather than pure water, used for this procedure and the subsequent washing of the organic layer.
My answer was
5. Saturated sodium chloride is used to rinse the Hickman Head rather than water since it is not polar and rinsing the Hickman Head with water would revert any 4-methylcyclohexene back to 4-methylcyclohexanol in the Hickman Head and thus lowering the percent yield; using water would shift the equilibrium towards the reactants. Also sodium chloride removes the small amount of phosphoric acid and also a small amount of water. If one were to add water, both 4-methylcyclohexene and phosphoric acid are partially soluble making difficult to remove the water later; sodium chloride makes the water less reactive so easier to remove by making the aqueous later more polar.
I have doubts because my professor (i didn't show him what i put) and he was telling me the NaCl makes the aqueous layer more ionic and therefore will remove the acid impurities without removing the alkene... so i am a lil confused
Thank you all for the help, and you will be seeing alot more of me :)