1. The problem statement, all variables and given/known data arrange the following eluents in an increasing order of Rf of aspirin ethyl acetate, n-hexane, n-butanol, methanol 2. Relevant equations 3. The attempt at a solution my order is n-hexane < n-butanol < ethyl acetate < methanol but the order is wrong. i am thinking: aspirin is polar, it will adhere onto the polar stationary phase. with the increasing polarity of eluents, the Rf will increase as aspirin will dissolve more in the mobile phase. So, whats wrong with my ans?