CHEM 6AL Lecture Notes - Lecture 4: Calcium Chloride, Sodium Sulfate, Zeolite

• School: UCSB
• Department: Chemistry and Biochemistry
• Course: CHEM 6AL
• Professor: Gainer

Document Summary

Removing one or more solutes from a solvent using its higher solubility in another solvent. Encountered during (cid:498)work-up(cid:499) step of the procedure. Perform reactions that actually makes bonds & in process of purifying it, add various solvents to get rid of what you don"t want. 2 solvents must be immiscible (separate into 2 different layers/phases) Aqueous phase: water-based solvent (salt water, fresh water, 1 mol naoh/hcl) Organic phase: any organic solvent not miscible w/water (hexane) # that allows us to judge how well something separates. K= (grams of cmpd. per ml of organic solvent)/(grams of cmpd. per ml of aq. solvent) K= (concentration in organic solvent)/(concentration in aqueous solvent) How much is extracted in an extraction? (final mass of solute in h2o)/(initial mass of solute in h2o)= ((v2)/(v2+v1k))n. V1 = volume of organic solvent used per extraction. V2 = original volume of h2o used. For a decent extraction, need k > 1. 5.