The pH scale measures the acidity or alkalinity of a substance, ranging from 0 to 14, with values below 7 representing acidity, above 7 representing alkalinity, and 7 representing neutrality.

Chemistry & Physics. Chemistry 1102: Indicators and the pH Scale. Season 1 Episode 1102 | 24m 51s. Acid/base indicators are described and used to identify substances as acids or bases.

Ocean acidification, explained. ... with a pH of about 8.1—roughly the same level of acidity as an egg white. (More acidic things fall lower on the pH scale.

The term pH means “potential of hydrogen,” and the scale is the negative base 10 logarithm of the concentration of positively charged hydrogen in a solution.

When the scale to measure the pH level of beer was invented by a chemist in the Carlsberg research laboratory, it was shared with brewers around the world. As the Great British Beer Festival kicks ...

A worker checks the pH level of desalinated water in the laboratory at the desalination plant in Palma de Mallorca on April 4, 2014. The pH scale was initially invented in 1909 by chemist S.P.L.