Gizmo Balancing Chemical Equations
Explore how to balance chemical equations using the Gizmo simulation. Learn key concepts like reactants, products, subscripts, and coefficients through real-life analogies and guided questions to understand synthesis and decomposition reactions.
Daniel Miller
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m l Gizmos
Name: Date:
Student Exploration: Balancing Chemical Equations
Vocabulary: coefficient, combustion, compound, decomposition, double replacement element,
molecule, product, reactant, single replacement, subscript, synthesis
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
The scouts are making s'mores out of toasted marshmallows, chocolate, and graham crackers.
1. What is wrong with the image below? . ____
2. Assuming a s'more requires two graham crackers, one marshmallow, and one piece of
chocolate, how many s'mores could you make with the ingredients shown?
Gizmo Warm-up
tn a chemical reaction, reactants interact to form products
This process is summarized by a chemical equation. In the
Balancing Chemical Equations Gizmo, look at the floating
molecules below the initial reaction: Hz + HiO.
1. How many atoms are in a hydrogen molecule {H: j?
2. How many atoms are in an oxygen molecule (O-j?
3. How many hydrogen and oxygen atoms are in a water molecule (HzO)?
4 In general, what does a subscript (such as the "2" in H j tell you about the molecule?
____i _______________________________________________________________________
5. A chemical equation is balanced if the number of each type of atom on the left side is equal
to the number of each type on the right side. Is this reaction balanced?
ZEHEHli.-W.-ifld cr -cJ.’.nj >■,r/tAbitir J ’ 2018 F* olortLsam - q
Name: Date:
Student Exploration: Balancing Chemical Equations
Vocabulary: coefficient, combustion, compound, decomposition, double replacement element,
molecule, product, reactant, single replacement, subscript, synthesis
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
The scouts are making s'mores out of toasted marshmallows, chocolate, and graham crackers.
1. What is wrong with the image below? . ____
2. Assuming a s'more requires two graham crackers, one marshmallow, and one piece of
chocolate, how many s'mores could you make with the ingredients shown?
Gizmo Warm-up
tn a chemical reaction, reactants interact to form products
This process is summarized by a chemical equation. In the
Balancing Chemical Equations Gizmo, look at the floating
molecules below the initial reaction: Hz + HiO.
1. How many atoms are in a hydrogen molecule {H: j?
2. How many atoms are in an oxygen molecule (O-j?
3. How many hydrogen and oxygen atoms are in a water molecule (HzO)?
4 In general, what does a subscript (such as the "2" in H j tell you about the molecule?
____i _______________________________________________________________________
5. A chemical equation is balanced if the number of each type of atom on the left side is equal
to the number of each type on the right side. Is this reaction balanced?
ZEHEHli.-W.-ifld cr -cJ.’.nj >■,r/tAbitir J ’ 2018 F* olortLsam - q
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