CHEM164 Lecture Notes - Lecture 23: Diethyl Ether, Miscibility, Methanol

• School: University of Alberta
• Department: Chemistry
• Course: CHEM164
• Professor: John Vederas

Document Summary

R-o-h - can donate and accept hydrogen bonds. Miscible in h2o + organic solvent longer alcohols are generally not miscible with water. e. g. ch3ch2ch2ch2oh soluble in h2o, but not fully miscible in all amounts. Less dense than water < 1. 0. Good solvents for polar + non-polar compounds. Non-polar (relatively), generally unreactive, especially to base. O ethyl ether eg. ch3ch2och2ch3 bp = 35 oc. Not miscible with water, good solvents for organic compounds. Low b. p. and m. p. than alcohols but higher than hydrocarbons. Ha is the conjugate acid of a-, and a- is the conjugate base of ha. The equilibrium constant, or acidity constant, ka, for this reaction can be expressed as: The oxygen of the oh group in methanol has a partial negative charge and the hydrogen has a partial positive charge. The o-h bond is easy to break and it can break spontaneously.