Experiment 20-The pH Paper Test

                                                                Experiment 20

AIM: 

To determine the pH of different substances using pH paper.
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APPARATUS AND MATERIAL REQUIRED: 

1. pH paper
2. Acids and bases (vinegar, lemon juice, baking soda, ammonia)
3. Water

pH Test

OBJECTIVES:

1. To learn how to use pH paper to test the pH of a substance.

2. To compare the pH of different substances.

RESULTS:

• pH paper changes color depending on the pH of the solution it is dipped in.
• Vinegar and lemon juice have a pH of less than 7, indicating that they are acidic.
• Baking soda and ammonia have a pH of greater than 7, indicating that they are basic.
• Water has a pH of 7, indicating that it is neutral.

CONCLUSION:

The pH paper test is a more accurate way to determine the acidity or basicity of a substance than the litmus paper test. This experiment showed that vinegar and lemon juice are acidic, while baking soda and ammonia are basic. Water is neutral.

pH Scale

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