Reaction in a ZipLoc Bag

1. Focus Question: Are chemical
reactions different using a
ziploc bag?
Mixtures and Solutions
Investigation 3-4

2. Reactants=Products
• What information does a chemical equation
provide?
• Is rust the result of a chemical reaction?
Explain.
• Is burning methane a chemical reaction?
Explain.
• Write a balanced equation for the burning of
propane.
C3H8 + 5O2 → 3CO2 + 4H2O

3. Response Sheet - Fizz Quiz
• Did he make a mixture?
• Did he make a solution?
• Did he make a reaction?

4. Content
• What does a chemical equation tell
you?
• How the atoms in the reactants and
products rearrange during a chemical
reaction.

5. What might happen if you put calcium chloride,
baking soda, and water in a ziploc bag?
• Procedure
– Measure 1 level spoon of calcium chloride and 1
level spoon of baking soda into bag
– Close bag except for an opening just big enough to
insert the syringe. Press all the air out of the bag.
– Use syringe to quickly add 50 ml of water to the
mixture in the bag. Immediately zip the bag closed.
– Observe as you each take turns holding and gently
shaking the bag.

6. Observations
• What happened to the bag?
• What made the bag puff up like a pillow?
• Where did the gas come from?
• What did you find out by doing the reaction in
the bag that you couldn’t find out doing the
reaction in a cup?
• How much gas formed as a result of the
reaction?
• How does the volume of gas compare to the
volume of substance you put into the bag?

7. Investigate New Reactants
• The calcium chloride and baking soda
produced a bag full of carbon-dioxide
gas. What other reactants could we use
to produce gas as a product?
• When you have a plan for a different
reaction that you think will produce gas,
get the substances you will need. Use
no more than 1 level spoonful of any
substance.

8. Results
• What was different in the reactants
between the two bag experiments?
• Which reaction produced more gas?
How do you know?
• What do you think will happen if we do
the bag experiment with all three
reactants?
• List –

9. Homework
• Read Summary: Fizz Quiz pg 39-40
and answer Questions.
• I-check 3 quiz on Monday, March 18
(14 & 12), and Tuesday, March 19 (15)
• Be familiar with the chemical formulas
for common substances we’ve used
• Be able to write balanced chemical
equations in both atomic model and
chemical equation form.

10. Homework
• Read Summary: Fizz Quiz pg 39-40
and answer Questions.
• I-check 3 quiz on Monday, March 18
(14 & 12), and Tuesday, March 19 (15)
• Be familiar with the chemical formulas
for common substances we’ve used
• Be able to write balanced chemical
equations in both atomic model and
chemical equation form.