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Balancing Equations Practice

Total questions: 37

Worksheet time: 8hrs 9mins

Name
Class
Date
1.
What is the number before a chemical formula called?
Ex: 2H2 + O2 --> 2H2O
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
2.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
3.
Is the following equation balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
No!
4.
Is the following equation balanced?
2C2H2 + 5O2 --> 4CO2 + 2H2O
a)
yes
b)
no
5.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
6.

Which equation is balanced?

a)

PbO2 + 2H2

b)

SO2 + H20 --> H2SO4

c)

2Na + 2H2O --> 2NaOH + H2

7.

Balance the chemical equation __Ca + __O2 --> __CaO. What is the correct coefficient for Ca?

a)

1

b)

2

c)

3

d)

4

8.

Balance the chemical equation __Ca + __O2 --> __CaO. What is the correct coefficient for O2?

a)

1

b)

2

c)

3

d)

4

9.

Balance the chemical equation __Ca + __O2 --> __CaO. What is the correct coefficient for CaO?

a)

1

b)

2

c)

3

d)

4

10.

Balance the chemical equation __Al + __N2 --> __AlN. What is the correct coefficient for Al?

a)

1

b)

2

c)

3

d)

4

11.

Balance the chemical equation __Al + __N2 --> __AlN. What is the correct coefficient for N2?

a)

1

b)

2

c)

3

d)

4

12.

Balance the chemical equation __Al + __N2 --> __AlN. What is the correct coefficient for AlN?

a)

1

b)

2

c)

3

d)

4

13.

Balance the chemical equation __P + __Cl2 --> __PCl5. What is the correct coefficient for P?

a)

1

b)

2

c)

3

d)

4

14.

Balance the chemical equation __P + __Cl2 --> __PCl5. What is the correct coefficient for Cl2?

a)

2

b)

3

c)

4

d)

5

15.

Balance the chemical equation __P + __Cl2 --> __PCl5. What is the correct coefficient for PCl5?

a)

2

b)

3

c)

4

d)

5

16.

Balance the chemical equation __KClO4 --> __KCl + __O2. What is the correct coefficient for KClO4?

a)

1

b)

2

c)

3

d)

4

17.

Balance the chemical equation __KClO4 --> __KCl + __O2. What is the correct coefficient for KCl?

a)

1

b)

2

c)

3

d)

4

18.

Balance the chemical equation __KClO4 --> __KCl + __O2. What is the correct coefficient for O2?

a)

1

b)

2

c)

3

d)

4

19.

Balance the chemical equation __Al(OH)3 + __HCl --> __AlCl3 + __H2O. What is the correct coefficient for Al(OH)3?

a)

1

b)

2

c)

3

d)

4

20.

Balance the chemical equation __Al(OH)3 + __HCl --> __AlCl3 + __H2O. What is the correct coefficient for HCl?

a)

1

b)

2

c)

3

d)

4

21.

Balance the chemical equation __Al(OH)3 + __HCl --> __AlCl3 + __H2O. What is the correct coefficient for AlCl3?

a)

1

b)

2

c)

3

d)

4

22.

Balance the chemical equation __Al(OH)3 + __HCl --> __AlCl3 + __H2O. What is the correct coefficient for H2O?

a)

1

b)

2

c)

3

d)

4

23.

Balance the chemical equation __Ca(OH)2 + __H3PO4 --> __Ca3(PO4)2 + __H2O. What is the correct coefficient for Ca(OH)2?

a)

2

b)

3

c)

5

d)

6

24.

Balance the chemical equation __Ca(OH)2 + __H3PO4 --> __Ca3(PO4)2 + __H2O. What is the correct coefficient for H3PO4?

a)

2

b)

3

c)

5

d)

6

25.

Balance the chemical equation __Ca(OH)2 + __H3PO4 --> __Ca3(PO4)2 + __H2O. What is the correct coefficient for Ca3(PO4)2?

a)

1

b)

3

c)

5

d)

6

26.

Balance the chemical equation __Ca(OH)2 + __H3PO4 --> __Ca3(PO4)2 + __H2O. What is the correct coefficient for H2O?

a)

1

b)

3

c)

5

d)

6

27.

Balance the chemical equation __Fe + __O2 --> __Fe2O3. What is the correct coefficient for Fe?

a)

1

b)

2

c)

3

d)

4

28.

Balance the chemical equation __Fe + __O2 --> __Fe2O3. What is the correct coefficient for O2?

a)

1

b)

2

c)

3

d)

4

29.

Balance the chemical equation __Fe + __O2 --> __Fe2O3. What is the correct coefficient for Fe2O3?

a)

1

b)

2

c)

3

d)

4

30.

Balance the chemical equation __HNO2 --> __HNO3 + __NO + __H2O. What is the correct coefficient for HNO2?

a)

1

b)

2

c)

3

d)

4

31.

Balance the chemical equation __HNO2 --> __HNO3 + __NO + __H2O. What is the correct coefficient for HNO3?

a)

1

b)

2

c)

3

d)

4

32.

Balance the chemical equation __HNO2 --> __HNO3 + __NO + __H2O. What is the correct coefficient for NO?

a)

1

b)

2

c)

3

d)

4

33.

Balance the chemical equation __HNO2 --> __HNO3 + __NO + __H2O. What is the correct coefficient for H2O?

a)

1

b)

2

c)

3

d)

4

34.

Balance the chemical equation __Al + __CuSO4 --> __Al2(SO4)3 + __Cu. What is the correct coefficient for Al?

a)

1

b)

2

c)

3

d)

4

35.

Balance the chemical equation __Al + __CuSO4 --> __Al2(SO4)3 + __Cu. What is the correct coefficient for CuSO4?

a)

1

b)

2

c)

3

d)

4

36.

Balance the chemical equation __Al + __CuSO4 --> __Al2(SO4)3 + __Cu. What is the correct coefficient for Al2(SO4)3 ?

a)

1

b)

2

c)

3

d)

4

37.

Balance the chemical equation __Al + __CuSO4 --> __Al2(SO4)3 + __Cu. What is the correct coefficient for Cu ?

a)

1

b)

2

c)

3

d)

4

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