Chemistry: Indicator - Litmus Paper

Litmus paper

• Has a special dye on it that changes colors in the presence of an acid or base. 

• Blue litmus paper turns red in an acid, and stays blue in a base. 

• Red litmus paper turns blue in a base, and stays red in an acid. 

• Neutrals react with both types of litmus paper turning it violet.

Chemistry: Indicator - Finding the pH Level with pH Scale

pH paper: 

Has a range of colors depending on the pH of the solution.

•The color of the paper is compared to the chart on the vial to determine the pH.