The hydrogen ion concentration of the oceans is about 2×10^−9 M. What is the pH? The hydrogen ion concentration of the oceans is about 2×10^−9 M. What is the pH? November 12, 2020 Category: Chapter 6 - Ionic Equilibrium (Level 1 and Level 2) , N Awasthi Physical Chemistry , Facebook Messenger WhatsApp Share this:TwitterFacebook Related