1. Jeopardy
Chapter 5
Science 9

2. Balancing Chemical Equations
Chemical Reactions
Types of Reactions
Rates of Reactions
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500

3. What does the arrow mean
yields
What does the arrow mean
in a chemical reaction?
Row 1, Col 1

4. What type of reaction has the
synthesis
What type of reaction has the
general formula
A + B  AB
1,2

5. What are the large numbers in front of compounds called?
coefficients
What are the large numbers in
front of compounds called?
1,3

6. What does “rate of reaction”
The speed or time it takes for the reaction to take place.
What does “rate of reaction”
mean?
1,4

7. Which side of the equation are
Right (after the arrow)
Which side of the equation are
the PRODUCTS?
2,1

8. Reaction in which two things
Double replacement
Reaction in which two things
switch places.
2,2

9. State the Law of Conservation
Matter (mass) cannot be created or destroyed
State the Law of Conservation
Of Mass
2,3

10. What happens to the rate of reaction if the temperature
The rate goes faster (time decreases)
What happens to the rate of
reaction if the temperature
is increased?
2,4

11. Reactions that release energy
exothermic
Reactions that release energy
are called __________.
3,1

12. combustion
CH4 + 2O2  CO2 + 2H2O
3,2

13. Yes, there are 4 H’s and 2 O’s on each side.
Is 2H2O  2H2 + O2 balanced?
3,3

14. Which effervescent tablet
Powder (more surface area)
Which effervescent tablet
dissolves fastest:
whole, pieces, or powder?
3,4

15. elements make or break bonds releasing or taking in what?
energy
When chemical reactions occur,
elements make or break bonds
releasing or taking in what?
4,1

16. decomposition
2PbSO4  2PbSO3 + O2
4,2

17. Balance: __ S8 + __O2  __ SO2
4,3

18. Relate SIZE to the rate of
The bigger the size, the slower the reaction.
Relate SIZE to the rate of
reaction.
4,4

19. Name three signs that a chemical reaction is taking place
heat, light, gas, solid, elements change identity, color
Name three signs that a chemical
reaction is taking place
5,1

20. Single replacement
3Mg + Fe2O3  2Fe + 3MgO
5,2

21. __Fe + __AgNO3  __Fe(NO3)2 + __Ag
Balance:
__Fe + __AgNO3  __Fe(NO3)2 + __Ag
5,3

22. They are used to speed up or slow down reactions.
What do catalysts do?
5,4