Introduction to pH
5:22
Khan AcademySal Khan
Introduction to pH
The pH scale is used to determine the acidity or basicity (alkalinity) of a substance. Acidic substances have pH values below 7, while basic substances have pH values above 7; neutral substances have a pH of 7. The pH scale is logarithmic, so each step represents a 10-fold change in concentration.
Feb 12, 2018
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