Question

someone help me with #4 and #6. Number 4 is related to #2. Thanks!!

2. Show the reaction of 1-anthrol with LIOH. Indicate which lay (aqueous or organic) each component in the react reside in. ion will mainly 3 tion of antha. 4. To the salt obtained in question 2, what would you do to recover 1- anthrol in its solid form? (include laboratory procedures) 5. 6. A sample of ibuprofen (Advil) is contaminated with a small amount of sand and toluene. Using active extraction (changing the polarity by addition of certain chemicals)) and a gravity filtration to remove a component, describe how you would obtain pure ibuprofen in its solid form from this mixture. Note that use of an organic solvent like ether should be used initially, and then any other procedures, including use of a separatory funnel is required. Note: All organic chemicals in reactions should be written with structural formulas!!!

Answer 1

We can write the stoichiometric in this way:

LiOH(aq)+HBr(aq)→H2O(l)+LiBr(aq)

Of course, when we write LiBr(aq) we mean the aquated species, which at a micro-level we might represent as [Li(OH2)4−6]+ or [Br(H2O)4−6]−; these are coordination complexes if you like of the Li+ or Br− ions with water ligands. Because water is present in such abundance, such solvation often tends to be ignored.

In the neutralization reaction, bond formation has EXPLICITLY occurred in the reaction to form water:

H3O++HO−→2H2O(l)

In the ionization reaction, to form the aquated ions from the salt, bond-formation has only implicitly occurred, and we have the idea that lithium and bromide ions are present as their aquated ions. Of course we might, say, add ethanol, to the solution and precipitate out the ionic species, LiBr, as a solid.