In the laboratory, scientists do a special kind of neutralization experiment, called a titration. Scientists use a titration to identify the strength of an unknown acid or base. To titrate an acid, they add small amounts of a base and check the pH after every addition. As a base is added, the pH of the acid solution will steadily increase. By measuring how much base must be added to reach a pH of 7, the experimenters know the strength of the original acid. The pH of the solution will get higher than 7 if more base is added than is needed to neutralize the acid. Scientists graph the pH changes during titration. To learn more about neutralization reactions of acids and bases:

1. Visit this Web site.
    Interactive Titration Curve Simulation

2. Then go to this Web site and click "Titration curves."
    Acid-Base Titrations

3. Then return to this page and click the Go on arrow.