1. The problem statement, all variables and given/known data The pH of a 1.00x10-8 M solution of HClO4 is 2. Relevant equations -log(H3O+) 3. The attempt at a solution I thought I could just do -log(1.00x10^8) = 8, but the answer is actually 6.98. Why? Does it have anything to do with it being a strong acid?