Jeopardy
Definitions
Balancing
Equations
Evidence of
Chemical
Reactions
Chemical
Equations
Potpourri
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$400
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Final Jeopardy
1 - $100

Define chemical equation.
A representation of a chemical reaction using
the formulas of the starting substances that
react and the new substances that are formed
1 - $200
Read the statement. What is this the definition
of?
One or more substances are changed into one or
more new substances by the reorganization of
component atoms

Chemical Reaction
1 - $300

What is a reactant? A product? Give an example.
A reactant is the substance that enters the
equation, the product is written on the right side
of the arrow in a chemical equation.
 2H2(reactant) + 02(reactant)> 2H2O(product)

1 - $400

What is a coefficient?

The numbers used to balance chemical
equations
1 - $500
Label all of the underlined parts of the equation.
2 NaOH(aq) + CaCl2(aq)  Ca(OH)2 + 2 NaCl(aq)
(3)
(3)
___________
____________
(1)
(2)
What is the whole thing called? (4)
 1-Reactants
 2-Products
 3-coefficients
 4- A Chemical reaction
2 - $100

Balance the following equation:
NI2 +I2 > NI3
N2+3I2 2NI3
2 - $200
Balance the equation
__C8H18+__O2__ CO2+ __H2O


2C8H18+ 25O2 16CO2+ 18H2O
2 - $300
Balance the equation
__FeCl3+ __NaOH __Fe(OH)3+ __NaCl


FeCl3+3NaOHFe(OH)3+3NaCl
2 - $400

Balance the equation:
Iron(III)nitrate in water solution reacts with
potassium sulfide in water solution to form
aqueous potassium nitrate and solid iron(III)
sulfide.

2Fe(NO3)3 + 3K2S 6KNO3+ Fe2S3
2 - $500
Write the balanced equation for the reaction
(include all states of matter)
C3H8 + O2  CO2 + H2O


C3H8 + 5O2  3CO2 + 4H2O
3 - $100

Which of the following is an example of a
chemical reaction? Explain why.
a.
b.

B
c.
3 - $200
Name three things that could happen if a chemical
change occured
Change in color
Formation of a solid (precipitate)
Change in temperature
Production of a gas
3 - $300

Is the following statement true or false. If false,
correct the statement.
Burning wood is evidence of a chemical change.

True.
3 - $400
Which of the following is evidence of a chemical reaction?
a. A piece of chalk is smashed into smaller pieces
b. Liquid water freezes and becomes ice
c. Your bike is left out in the rain and it starts to rust
d. Dissolve ice tea powder into water to make iced tea

C
3 - $500
What is the difference between a chemical and
physical change? Give one example of both. Make
sure to explain your answer.
A physical change is the change of a physical property
(shape,color,size) and is easily reversible
i.e. (seperation of a sand and gravel mixture)
 A chemical change occurs when substances react to form a
new chemical entity, same atoms are used but different
molecules are created. Chemical changes are not reversible
(would be very difficult to do so)
i.e. (add a clear substance to another clear substance
and the product is blue and bubbly)

4 - $100
In the equation below, how many atoms of
Magnesium are there in the product?
Mg + TiCl4  MgCl2 + Ti


2
4 - $200
What does the coefficient infront of the Silver Iodide in the product mean?
 PbI2 + 2Ag(NO3)  Pb(NO3)2 + 2AgI
A. the reaction produces 3 molecules of Silver Iodide
B. the reaction produces 2 atoms of Silver Iodide
C. the reaction produces 2 atoms of Silver
D. the reaction produces 2 molecules of Silver Iodide

D
4 - $300

What do you have to do at the end of balancing
the equation to make sure you are correct?

You have to check to make sure all of the types
of atoms on the reactant and product sides have
the same number
4 - $400
In the equation below how many molecules of
are there of Silicone Sulfide in the product?
Si + S8  Si2S4

2
4 - $500

How do you balance a chemical equation? Write
a set of rules. (**must be in proper order**)
1. Write the formulas of the reactants and products to give the
unbalanced chemical equation.
2. Balance by trial and error starting with the most complicated
molecule(s). Leave pure elements to the end. Work progressively
through the elements.
3. Treat polyatomic ions as a unit if they are not affected by the
reaction.
4. At the end check to be sure the equation is balanced (same
numbers of all types of atoms on the reactant and product sides).
5 - $100

What happens when an ionic compound is
dissolved in water?
The ions separate and move around
independently.
5 - $200

What does the Law of Conservation of Mass
state? What does it mean?

The Law of Conservation of Mass states that in a
chemical reaction there is no loss of mass. This
means that each type of element will have the
same amount before and after the reaction (in
the reactant and product sides)
5 - $300
Balance the following equation :
AgNO3 + NaCl → AgCl(s) + NaNO3


The chemical equation is already balanced.
5 - $400
Balance the following equation:
Na2CO3 + HCl  NaCl + H2O + CO2


Na2CO3 + 2HCl  2NaCl + H20 + CO2
5 - $500
Balance the following equation:
___ CO2 + ___ H2O  ___ C6H12O6 + ___O2


6CO2 + 6H2O  C6H12O6 + 6O2
Final Jeopardy
Using the following formulas as reactants and
products make at least two correct equations.
Br2, Fe2S3, H2O,I2,O2,Li,C3H8, Zn, LiOH, H2,
KNO3, NaI Pb(NO3)2,CO2, Na2CO3, ZnCl2, K2S,
and NaBr (you do not need to include states of
matter)
 Br2+ 2NaI  2NaBr+ I2
 2Fe(NO3)3+3K2S  6KNO3+ Fe2S3
 2Li+2H2O  2LiOH+ H2
