BlackJack21

My justification for believing in god is personal experience. I believe that the universe as we know it is a single, higher being that we refer to as god. I believe that our perception of reality which is constructed of 4 dimensions (3 of space and one of time) and processed as a continuous stream we call consciousness is just a small offshoot from a larger pool of the consciousness of that higher being. We are all connected to each other through conciousness. We are all essentially that being, god, experiencing our self in a singular, subjective reality. I don't advocate psychedelic drug use but my perception of our world has been shaped by LSD and DMT. Once you've experienced the way the world really works for yourself, you'll have all the justification you will ever need. You are god.

I have a solid that I am to purify by recrystallization using pentane/ether. Does this mean to perform a two solvent recrystalliztion; Heat a solution of pentane with the solid until it dissolves, then add a bit of ether until the solution becomes cloudy, then add some more pentane until the solution goes clear then cool the solution? Or would you use a mixture of both solvents and recrystallize that way? Also, since pentane boils at a very low temperature, do you just heat it a very small amount so it dosn't boil?

I'm just learning about halogenation and radical reactions and don't really understand how selective monobromination is done practically.

I was given an "unknown" light yellow oily liquid with the task to evaporate it an get a crystalline solid. I'm not really sure what the solvent is or what the compound is however I believe it is an organic compound. I only believed it to be decomposed based on the rapid color change and change in texture. Yellow-orange oily clear liquid to black globular oil. I have been able to reduce the liquid from ~100mL to ~20mL but I can't find a practical way to reduce the last portion without burning it.

What steps would you take to ensure a bromination occurs slowly and doesn't proceed as a radical reaction. I have tried performing the reaction at 0 degrees celcius and adding the bromine (mixed in with a solvent) slowly drop by drop. But I think its still not working right. My instructor suggested I maybe cover the reaction vessel with tin foil to keep the UV light light out. I have a few days before I can get back to the lab so I wanted to see what anyone else thinks.

I have tried to distill off the solvent at 50 degrees and high pressure but it just won't evaporate. I can't increase the pressure anymore (I have a very good vac pump) so I increased the temperature. The solution eventually decomposed before I could get the solvent to go. Any suggestions?

Say you had an organic compound with a relatively low melting point (say 50 degrees celcius) that was currently in a solution with a boiling point of say 100 degrees celcius. If you wanted to evaporate the liquid to obtain the solid, how would you do this? I'm confused since the BP of the solution is higher than the temperature needed for the solid to crystallize. So if you make the solution hot enough to evaporate the liquid the solid will never crystallize out. If you heat it high enough to boil off the solvent at what point do you know to stop heating and let the compound crystallize out. Could you just boil off the liquid and the residue your left with is your compound?