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GeneralNetflix - The Resolution Pin
Michael Martin17-Jan-17 21:46
professionalMichael Martin17-Jan-17 21:46 
JokeSwallow the last bite before looking at this! Pin
Kornfeld Eliyahu Peter17-Jan-17 21:01
professionalKornfeld Eliyahu Peter17-Jan-17 21:01 
GeneralRe: Swallow the last bite before looking at this! Pin
Jon McKee17-Jan-17 21:13
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F-ES Sitecore17-Jan-17 22:38
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GeneralRe: Swallow the last bite before looking at this! Pin
OriginalGriff17-Jan-17 22:43
mveOriginalGriff17-Jan-17 22:43 
GeneralRe: Swallow the last bite before looking at this! Pin
W Balboos, GHB18-Jan-17 0:21
W Balboos, GHB18-Jan-17 0:21 
GeneralRe: Swallow the last bite before looking at this! Pin
OriginalGriff18-Jan-17 0:39
mveOriginalGriff18-Jan-17 0:39 
GeneralRe: Swallow the last bite before looking at this! PinPopular
W Balboos, GHB18-Jan-17 1:03
W Balboos, GHB18-Jan-17 1:03 
Recall that in real life I was a real chemist.

The 'a homogeneous mixture' quote isn't quite sufficient: it must be homogeneous on a molecular level (ionic is OK) - and a characteristic is that it is transparent* (homogenized milk is not a solution) - it is a colloid. Colloids are homogeneous. So homogeneity is necessary, but not sufficient. If you've ever had a "Bob Marley" on vacation, it might not even be necessary to be homogeneous - as you've several distinct solutions in a single container.

Pure ethanol is obtained by adding a bit of benzene (C6H6) to the alcohol/water mixture. An even lower boiling azeotrope exists consisting of benzene/water/ethanol. I used to remove traces of water by boiling the ethanol with magnesium turnings (for a while) and then collecting the distal late (see: reflux condenser).

Lab grade alcohol DOES NOT contain methanol. Denatured alcohol does. Lab grade alcohol, as you call it, is the (multiply distilled) azeotrope (ca. 190 proof). Other than the expected water component it would contain nothing else (and wasn't taxed!). We used some 200proof (i.e., pure alcohol) available in pint bottles (w/a no-tax tax stamp) for the solvent in a flashlamp pumped dye laser. To recycle the stuff (for reuse or eventually pouring into my car's gas tank) I used the above mentioned magnesium methodology. Using methanol instead of benzene (for dehydration) has been found unsuitable (a good thing, too: methanol is scary stuff).

The main problem (as a consumer) with the pure (200 proof) ethanol is that it can cause tissue damage as it somewhat aggressively sucks water out of your cells to dilute itself. Alcoholic beverages always do this to a small extent, but it gets more powerful with the difference in alcohol/water content between your cells and what you're drinking. (In the cases of some people, this osmosis may be reversed after they drink enough, such as Nagy)


Next lesson: vesicles and pellicles



*obviously doesn't include (many) alloys, amalgams, and other items which, intrinsically, are opaque.
Ravings en masse^
"The difference between genius and stupidity is that genius has its limits." - Albert Einstein
"If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010

GeneralRe: Swallow the last bite before looking at this! Pin
OriginalGriff18-Jan-17 1:19
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dan!sh 18-Jan-17 1:38
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Mycroft Holmes18-Jan-17 11:00
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GeneralWhat The...? Pin
Brisingr Aerowing17-Jan-17 14:00
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Marc Clifton17-Jan-17 14:56
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Brisingr Aerowing17-Jan-17 15:09
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Rajesh R Subramanian17-Jan-17 15:18
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GeneralMessage Closed Pin
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Rajesh R Subramanian17-Jan-17 16:16
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CPallini17-Jan-17 22:04
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OriginalGriff17-Jan-17 23:07
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Mark Parity17-Jan-17 23:49
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