Hey everyone, still relatively new to the whole organic chem thing, but it's slowly turning into an obsession, and I'm trying to make up for my lack of formal training now.
I was wondering what best practices are/anything to be aware of while dilluting acids. Specifically, I'm probably going to be trying to dillute muriatic acid to its azeotrope concentration of around 22% (or something around there), so hopefully when heated under reflux into a soxhlet extractor or similar, the pH of the condensate remains relatively close to the pH in the boiling flask.
Along this line, user benzyme kindly directed my attention to
this thread, in which post 11 references the article
Amino and Fatty Acids of Wild Edible Mushrooms of the Genus Boletus, Dembitsky (2010) and their preferred mixture of HCl for refluxing.
Quote:2.2. General extraction procedures of fatty acids
Fresh mushrooms were extracted (Soxhlet) with ethanol-water-HCl (90:10:1, v/v/v) over 24h. The ethanolic residue was further extracted with light petroleum, and then dichloromethane. All fractions were combined, evaporated to dryness at 5oC under reduced pressure, and then dissolved in 2 mL of a cold mixture ethanol-dichloromethane (1:1, v/v). This solution was used for separation by HP-TLC and GC-MS, and followed chemical analysis [1,11,36].
*Is this a known "recipe" for an azeotrope of ethanol, water, and HCl?
*Are there such "recipes" in existence/where can I find them?
*Is the HCl they're talking about the pure gas form? If so, how would I go about calculating the volume of HCl gas dissolved in a specified quantity of muriatic acid? Would it be as simple as 100mL of 30% muriatic acid has 30mL of HCl dissolved in it?
Thanks in advance, and feel free to throw any other suggestions/tips about anything my way!