SDN Members don't see this ad. (About Ads) A couple questions here: 1. How do you tell if something is soluble in water? 2. How do you tell if it is polar? 3. Are there any rules for determining if something is strongly/weakly acidic (I know all the strong acids, but when it comes down to differentiating between weak acids, I get stuck)? 4. Also--esters, ethers, amines... are these soluble in water? are they polar or nonpolar? agh these ones get me every single time! Thanks!