1. The problem statement, all variables and given/known data Consider: A(aq) + D(l) -> B(aq) + C(aq) Rate Law: k[H+][A] Does the rate increase, decrease, or stay the same, when 500mL of water are added to the solution? 2. Relevant equations 3. The attempt at a solution My thought was no. The water doesn't have any effect on the chemical reaction. All I could think of was a dipole dipole interaction between the H2O(l) and the H+ which might lower the collision factor because of interference, which in turn would lower the rate of the reaction. Again though, I'm not sure. Can someone shed some light please? My exam is on Monday and this question is coming home drunk and beating me up. Edit: Nevermind. The addition of more solvent dilutes the solution. Decrease in concentration = decrease in rate.