(CLICK HERE FOR PIN-UP POSTER – pdf file ~140k) – We suggest photocopying at 129% – LTR to 11×17 – Metric: pH Range: 0-14 (no units) Measures: Degree of acidity or alkalinity. It is a logarithmic scale expressing the concentration of Hydrogen ions in solution. pH = -log10 [H+] A solution is “acidic” if pH is less than 7 (Hydrogen ion concentration is greater than 10−7 M), “neutral” if pH equals 7 (Hydrogen ion concentration equals 10−7 M), and “alkaline” if pH greater than 7 (Hydrogen ion concentration is less than 10−7 M). As was pointed out here, pH measures…