What is pH?

The pH scale shows the acidity or alkalinity of a solution. Berkeley Pit water has a pH around 2.5.pH is a measure of the acidity or alkalinity of a solution. Pure or neutral water has a pH of 7.0. Acids are defined as those solutions that have a pH less than 7; while bases are defined as those solutions that have a pH greater than 7. The pH scale is logarithmic. Unlike linear scales, which have a constant relationship between the item being measured and the value reported, each individual pH unit is a factor of 10 different than the next higher or lower unit. For example, a change in pH from 2 to 3 represents a 10-fold decrease in acidity, and a shift from 2 to 4 represents a 100-fold (10 × 10) decrease in acidity.

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