+
pH Scale

pH Scale

Author: Nathan Lampson
Description:
This lesson will introduce the concept of pH, acids and bases.
(more)
See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

28 Sophia partners guarantee credit transfer.

281 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 25 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial

You've probably heard of acids - corrosive liquids that eat through desks.  Well, in order to measure how acidic a substance is scientists use something called the pH Scale.  The pH scale ranges from 0-14 but some very strong acids can have pH levels below 0.

The pH scale displays the amount of an atom called hydrogen ions.  The greater the concentration of hydrogen ions a substance has, the more acidic.

On the other end of the pH scale are a different type of extreme substance called bases.  Bases can cause burns and be corrosive just like acids.  The concentration of a base is determined by the number of molecules called hydroxide ions.  If a substance is considered very basic it might have a pH of 14.

If the concentration of hydroxide ions and hydrogen ions is equal, a neutral pH of 7 is achieved. Water has a pH of 7 and is neither an acid or a base.