Notebook Page
112
Neutralization of a Soft Drink
Objective: Observe the pH of a soft drink and dilute ammonia and illustrate
how acids and bases can neutralize each other.
Materials:
-dilute household ammonia
-phenolphthalein (indicator – turns pink in presence of a base)
-colorless soft drink
-test tube
-litmus paper (indicates the pH of a substance through color change)
-goggles
Procedure:
1. Use litmus paper to determine if the dilute ammonia is an acid or base. Record
your result in the data table below.
2. Use litmus paper to determine if the soft drink is an acid or base. Record your
result in the data table below.
3. Fill half of the test tube with the soft drink. Add 2-3 drops of phenolphthalein.
4. Add dilute ammonia to the test tube ONE DROP AT A TIME until the liquid
turns pink and stays pink for at least 30 seconds.
5. Test the product with litmus paper to see if it is an acid, base, or neutral.
Record your results in the data table below.
Data
Substance
Dilute Ammonia
Soft Drink
Product
Litmus Test (pH)
Acid/Base/Neutral
Conclusion:
The soft drink was an _________________, while the dilute ammonia was
a __________________. The reaction of an acid and a base is known as
___________________________. The soft drink was ______________________
by the dilute ammonia.
In neutralization reactions, the H+ from the ____________________
reacts with the OH- from the base to form ______________________________.
The word equation for the neutralization of an acid and a base is:
_________________________________________________________________.