Data table Evidences of Chemical Observation Before the change Chemical System After the change Change A. Burning a piece of paper B. Styrofoam and calamansi juice C. Baking powder and vinegar D. Milk and vinegar
Data table Evidences of Chemical Observation Before the change Chemical System After the change Change A. Burning a piece of paper B. Styrofoam and calamansi juice C. Baking powder and vinegar D. Milk and vinegar
Chapter8: Forms Of Drugs And How They Act
Section: Chapter Questions
Problem 30RQ
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Question
Activity 2Objective: Describe what happens to substances that undergo a chemical change.
Materials: used paper match used styrofoam plate or cups
baking powder Vinegar liquid milk pure calamansi juice
Procedure:
A. Burning a piece of paper
You need a piece of paper. Put it over the flame. Compare the color before and after
burning.
B. Styrofoam and calamansi juice
Drop pure calamansi juice into a Styrofoam plate or cups. Then observe what happens
to Styrofoam.
C. Baking powder and vinegar
Put one tablespoon of baking powder in a dry small bottle. Add water and observe
what happens.
D. Milk and vinegar
Put 3 tablespoon of vinegar in a glass bottle then add liquid milk drop by drop.
If the liquid milk is not available prepare from powdered milk to water. Then observe
what happens.
E. Complete the table below. In the observation column, describe the materials
before the reaction and the results after the change. Then give the evidences of
chemical change in the last column.
Data table
Chemical System
Observation
Evidences of
Chemical
Change
Before the
change
After the change
A. Burning a
piece of paper
B. Styrofoam and
calamansi
juice
C. Baking
powder and
vinegar
D. Milk and
vinegar
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