Its in the Bag Lab Summary
On a separate sheet of lined paper…. Include the following information. Please note that if you need to you may type
this summary.
Introduction – opening sentence… The “It’s in the Bag Lab” illustrated many chemistry concepts. For example, …
chemical equations, law of conservation of mass and chemical changes.
Conclusion… = closing sentence… The “It’s in the Bag Lab” summarized many chemistry concepts
Please note: For all chemical equations listed below – the subscripts are not written the way they should be.
Part A
2 NaHCO3 + CaCl2 + H2O ===> CaCO3 + CO2 (gas) + 2 NaCl +
H2O
Part B = baggie 1
NaHCO3 + H2O ===> NaOH (base) + H2CO3
Part B 2 = baggie 2
CaCl2 + H2O ===> CaO + 2 HCl (acid)
Part C = combine products from baggie 1 & 2
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What you did
What you observed (use vocab)
Chemical Equation
Law of conservation of Mass
(define/relate to lab)
What you did
What you observed (use vocab)
Chemical Equation
Chemical Change (define/support with
examples from the lab)
What you did
What you observed (use vocab)
Chemical Equation
Boring Chemical Change (support with
examples from the lab)
What you did
What you observed (use vocab)
Chemical Change
Chemical Equation – Challenge = only
include if you want to – this is difficult
and is a bonus
Good vocabulary to include in your summary…
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Physical change, chemical change, <define and give specific examples from the lab>
law of conservation of mass (matter can neither be created nor destroyed it simply changes form) =
mass of reactants = mass of products
Endothermic (occurs when heat is absorbed during the mixing of substances in a chemical reaction – feels like
the substances are getting cooler)
Exothermic (occurs when heat is released during the mixing of substances in a chemical reaction – feels like the
substances are getting hotter)
evidence of a chemical change (sound, odor, heat (temperature change ), light, color change, precipitate
formed, gas produced (bubbling)
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Phenol red – indicator = a substance that changes color in the presence of another substance
Phenol red = pink = if pH above 8.2 = base
Phenol red went from pink  yellow if pH below 6.8 = acid
Sample Writing
Keep it simple – keep it technical (dry, dull boring, scientific writing)
The “It’s in the Bag Lab” illustrated many chemistry concepts. For example, … chemical equations, law of conservation of
mass and chemical changes.
In Part A, I added one scoop of baking soda and one scoop of calcium chloride and 10 mL of water to a ziplock baggie
and then mixed the reactants. I observed the following (which indicated that a chemical change occurred) there was the
sound of fizzing, a gas was produced (the baggie inflated and got puffy) there was a color change from pink to yellow
and there was a temperature change the baggie got (hotter/colder – indicating exothermic reaction/endothermic
reaction … you choose what happened in your lab). <You can include the definitions for chemical change here> Part A
also illustrated the law of conservation of mass which states that matter can neither be created nor destroyed it simply
changes form <the mass of the reactants = the mass of the products>. For example in my lab, the initial mass was ___g
and the final mass was ___g. Therefore, my lab supports the law of conservation of mass. <The difference in the initial
and final mass is because….> The chemical equation for this part of the lab is 2 NaHCO3 + CaCl2 ===> CaCO3 + CO2 + 2 NaCl +
H2O
Or….
You can submit your “summary” in the form of two column notes….
Part A =
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What you did = In Part A, I added one scoop of
baking soda and one scoop of calcium chloride and
10 mL of water to a ziplock baggie and then mixed
the reactants.
What you observed (use vocab) = I observed the
following (which indicated that a chemical change
occurred) there was the sound of fizzing, a gas was
produced (the baggie inflated and got puffy) there
was a color change from pink to yellow and there
was a temperature change the baggie got
(hotter/colder – indicating exothermic
reaction/endothermic reaction … you choose what
happened in your lab).
Chemical Equation = ….> The chemical equation
for this part of the lab is 2 NaHCO3 + CaCl2 ===>
CaCO3 + CO2 + 2 NaCl + H2O
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Law of conservation of Mass (define/relate to lab)
= Part A also illustrated the law of conservation of
mass which states that matter can neither be
created nor destroyed it simply changes form <the
mass of the reactants = the mass of the products>.
For example in my lab, the initial mass was ___g
and the final mass was ___g. Therefore, my lab
supports the law of conservation of mass. <The
difference in the initial and final mass is
because….>