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1. Hydrogen ion concentration or pH value is the logarithm of the reciprocal of the gram ionic hydrogen equivalents per liter: pH = log [1/(H+) per liter]. Water has a concentration of H+ ion of 10 - 7 moles per liter or a pH value of 7. An indication of the relative [[acidity]] or [[alkalinity]]. Values below 7 are increasing acid; above 7 increasing alkaline.<br><br> | 1. Hydrogen ion concentration or pH value is the logarithm of the reciprocal of the gram ionic hydrogen equivalents per liter: pH = log [1/(H+) per liter]. Water has a concentration of H+ ion of 10 - 7 moles per liter or a pH value of 7. An indication of the relative [[acidity]] or [[alkalinity]]. Values below 7 are increasing acid; above 7 increasing alkaline.<br><br> | ||
Latest revision as of 15:12, 24 July 2007
1. Hydrogen ion concentration or pH value is the logarithm of the reciprocal of the gram ionic hydrogen equivalents per liter: pH = log [1/(H+) per liter]. Water has a concentration of H+ ion of 10 - 7 moles per liter or a pH value of 7. An indication of the relative acidity or alkalinity. Values below 7 are increasing acid; above 7 increasing alkaline.