Oceanography Study Guide Sample Pages

pH pH stands for 'potential of Hydrogen' and is a measure of acidity or alkalinity of water soluble substances. A pH value is a number from 1 to 14, with 7 as the middle (neutral) point. Values below 7 indicate acidity which increases as the number decreases, 1 being the most acidic. Seven is neutral. Over the past 300 million years, ocean pH has been slightly basic, averaging about 8.2. Today, it is around 8.1. pH line and kit Illustration Bob Moffatt Page 199 2018 TRIAL EDITION Copyright Wet Paper Publications Sample page