Write the Henderson-Hasselbalch equation for a propanoic acid solution ( CH 3 CH 2 CO 2 H CH3CH2CO2H , p K a = 4.874 pKa=4.874 ) using the symbols HA HA and A − A− , and the given p K a pKa value for propanoic acid in the expression. ?

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)

Are oil and water a mixture or solution