u1l4 science safety true or false - baking soda and vinegar balloon
TRANSCRIPT
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True or false?
I should……
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Play with science equipment.
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Tie back long hair.
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Wear eye protection if necessary.
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Keep paper and books near the
burner.
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Not pay attention to the teacher.
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Today, we
should….
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NOT play with science
equipment.
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Tie back long hair.
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Wear eye protection if necessary.
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But today, it is NOT necessary!
Just be careful.
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And of course, pay attention to
Ms. Milan!
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On to the experiment!
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Step 1: Define the Problem
What will happen if I combine
baking soda and vinegar?
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Step 2: Form a Hypothesis
After mixing water and vinegar
together with baking soda, I
think….
Write the hypothesis in your
book on page 22.
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For this experiment, we will use…
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Test the hypothesis: Step 1
Using your funnel
pour vinegar into
your bottle.
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1/3rd of the bottle
should be filled
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Step 2
Using another
(dry) funnel pour
baking soda into
your balloon.
Fill the balloon
approx. 1/2 way.
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Step 3
First, stretch the balloon.
Then, cover the top of the
bottle with your balloon.
Make sure you don't let the
baking soda spill into the
bottle early.
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Step 4
When ready, lift
your balloon and
let the baking
soda fall into the
vinegar.
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Let’s watch and see what happens!
https://www.youtube.com/watch?v=JK5-2X_GqP8
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Step 6: Analyze and draw conclusions
Open to page 25 and
answer the questions in
your book.
Include any other
observations.
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Step 6
Discuss how the
baking soda &
vinegar produce a
gas which fills the
balloon.
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Because HC2H3O2 (the acetic
acid in vinegar) + NaHCO3
("baking soda") gives:
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NaC2H3O2 (sodium acetate) +
H2CO3 (carbonic acid). The
carbonic acid then
breaks down into H2O (water)
and C2O( carbon dioxide).