1. The problem statement, all variables and given/known data If 50ml of 0.004M H2CrO4 was combined with 50 ml of 0.005M HNO3 what is the pH of the resulting solution? 2. Relevant equations Moles H3O=Moles OH ? Formula for KA 3. The attempt at a solution So, here's what I have so far. I made the H2CrO4 represent the acid, and the HNO3 represent the base. I then subtracted them to get the excess, and then found the molarity of that. But I have no idea if I chose the right things to represent acids and bases, in fact I have no idea if I'm doing the right thing. Somebody please help!