The P/H Scale

The P/H Scale

What is it?

The pH scale measures how acidic or basic a substance is. It ranges from 0 to 14. If a pH is lower than 7 it indicates the solution is an acid. If it is above 7 it is a base or Alkaline. If a pH is a 7 it is neutral. Strong acids have lower pHs than weak acids and strong bases have lower pHs than weak bases. A neutral solution is neither an acid or base. It has a pH of 7. Scientists use a pH number to show the strength of an acid or base. A pH is measured by dipping litmus into solution such as water or other substances. Chemicals that are very basic or acidic are called "reactive." Automobile batteries have acids which are reactive and contain a stronger form of some of the same acid that is in acid rain. Also household drain cleaners often contain lye, a very alkaline that is reactive. Vinegar and lemon juice are acidic substances and laundry detergents and ammonia are basic. Pure water is neutral witch means that it has a pH of 7.0 . It is not reactive

Who invented it?


-Soren Sorensen

-Danish chemist

-Introducted his pH scale in 1909 it is very valuable and is still used today

-It gave doctors, chemists, and gardens a measurment that could tell them exactly how acid (sour),alkine(sweet)or neutral a substance

What does it look like

Here are a few different variations of the Ph Scale