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| definition | Measure of the acidity or alkalinity of a solution. The logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per litre; provides a measure on a scale from 0 to 14 of the acidity or | ||||||
| scope note | Measure of the acidity or alkalinity of a solution. The logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per litre; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and <7 is acidic and >7 is basic). | ||||||
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| top concept of | uom original | ||||||