Egg-Dye Solutions Activity Sheet Page 2
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4EXPERIMENTAL PROCEDURE
1.
3.
Test each of your solutions with litmus paper
Add 3-5 drops of food coloring to the water cup.
to determine if they are acids or bases. If you
Add the same color dye to the other cups and try
do not have litmus paper, have the students
to make the color in each cup the same shade;
make predictions before you tell them which
this may require different amounts of drops.
are acids and bases.
Because milk of magnesia is white, its solution
2.
Fill one cup with water to serve as a control.
will be softer in color.
4.
Pour a different acid or base into each cup.
Place an egg in each cup and let them soak for
Make sure you pour enough in the cup to
10 minutes.
5.
submerge the egg. Borax is a solid, so dissolve
After 10 minutes, remove each egg from its
some in water. Milk of magnesia can be diluted
solution. The milk of magnesia egg should be very
in water too.
gently rinsed under water. Be sure not to mix up
the eggs. Observe each egg’s appearance.
ANALYSIS
Use the questions from the activity sheet to discuss the experimental data to accept or reject the hypothesis.
GOALS
Upon completion of this activity, students should be able to…
•
Understand the difference between an acid and a base.
Fun Facts
•
Determine whether acids or bases are better for dyeing eggs.
When dyeing eggs,
•
Explain what an indicator is and how a specific indicator, litmus
vinegar is often used
paper, acts in the presence of acids and bases.
because its acidic properties
cause the eggshell to
EXTENSION
soften and absorb a large
amount of dye.
Before the experiment, have the students predict whether each solution is
an acid or a base. Then, ask them to predict which solution(s) will work best for
dyeing the eggs and why. Have the students record their predictions for each
solution. After the experiment, have the students record and compare their predictions
with what actually occurred.
NOTES
Lesson 9:
Egg-Dye Solutions
45
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