What does PH stand for in chemistry?


The symbol pH stands for the "power of hydrogen." The pH of a solution measures how many hydrogen ions are present in a solution. The numbers on the pH scale tell whether a solution is acidic or basic.

Values for pH usually run from 0 to 14, with lower numbers representing extremely acidic substances and higher numbers delineating substances that are strong bases. Pure water has a neutral pH, which is 7. Concentrated hydrochloric acid is extremely acidic and registers at a pH of 0. A concentrated strong base, such as sodium hydroxide, or lye, has a pH of 14. The pH of substances is measured by using a pH meter or with red and blue litmus paper.

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Chemistry Facts: What Does Ph Stand For?
The Ph in the chemistry test used to test the acidity of substances stands for 'potential hydrogen,' as in how much hydrogen is in each of the substances being tested. Learn what Ph stands for when testing for acids and bases in this free video on... More »
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