1. The problem statement, all variables and given/known data For this chromatography graph there are 2 peaks: One of them is propanoic acid and another one is pentanoic acid. The more polar compound will have a longer retention time. Which peak belongs to which compound. 2. Relevant equations 3. The attempt at a solution The answers says that the first peak is pentanoic acid and the second peak is propanoic acid. But I thought pentanoic acid would be the second peak as it has stronger intermolecular forces because it has a larger electron cloud. Both have the carboxylic acid functional group so they should be the same. Could someone tell me if I am right? And if not, why am I wrong. Cheers!