I am in Chem AP in high school and it is rediculously tough. Although, I try to study the book by myself, but I always have questions. Too many to ask the teacher. I was wondering if you guys could clear those out. Thx a lot. 1. I read in the book that H20 is acid. But I always thought water is neutral. 2. Since acid are electron donator, shouldnt they all have negative charge on top? 3. Are Alkane, Alkene, and Alkyne, neutral, acid, or base? 4. I know whenever something burns, oxygen is present on the other side of the equation, is this same for heated?(ex. ethanol is burned completely in air) 5. "Aqueous solutions of oxalic acid and excess potassium hydroxide" I am suppose to write balanced ionic equations for the following reactions. First of all, how would it matter to me if know weather oxalic acid is aqueous or not? Second, what does excess imply here? I remember hearing in class that excess means that there is enough potassium hydroxide to complete the whole reaction. But what difference does it make in writing out the equation? Btw, here is the answer to this question: H2C2O4 + OH- = H2O + C2O4 2-(this is an ionic equation therefore potassium was crossed out) Note: THe only questions I post here are the ones my friends don't know and I couldn't find in google. Thanks a lot for helping me out guys.