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Balancing Equations Practice

Total questions: 60

Worksheet time: 2hrs 52mins

Name
Class
Date
1.

Which of the following equations are correctly balanced?

a)

12CO2 + H2O

⟶

C6H12O6 + O2

b)

CO2 + H2O

⟶

3C6H12O6 + O2

c)

CO2 + 9H2O

⟶

C6H12O6 + O2

d)

6CO2 + 6H2O

⟶

C6H12O6 + 6O2

2.

Balance the following equation:

___ H2+ ___ O2 → ___ H2O

a)

1, 1, 3

b)

2, 2, 2

c)

1, 2, 1

d)

2,1, 2

3.

Fill in the blanks with the coefficient:s that correctly balance the equation:

PCl5 + _ H2O ⟶ _ HCl + H3PO4

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

4.

Which equation is balanced?

a)

PbO2 + 2H2 ⟶ H2SO4

b)

SO2 + H20 ⟶H2SO4

c)

2Na + 2H2O ⟶ 2NaOH + H2

d)

2Na + 2H2O ⟶ 2NaOH + H

5.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

_Zn+_HCl ⟶ _ZnCl2 +_H2

a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
6.

Balance this equation: P4+O2  ⟶  P2O3

a)

3 P4+ O2 ⟶ 2 P2O3

b)

 P4+ O2 ⟶ 2 P2O3

c)

 P4+ 3 O2 ⟶ 2 P2O3

d)

 P4+ 2 O2 ⟶ 3 P2O3

7.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

__ Al + __ FeO → Al2O2 + __ Fe

a)

1, 1, 2

b)

2,1,2

c)

2, 2, 2

d)

2,4,2

8.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)? _SnO2 +_H2 ⟶ _Sn +_H2O

a)
1,1,2,1
b)
1,2,1,1
c)
1,2,1,2
d)
1,2,2,1
9.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)? _CF4 + _Br2  ⟶ _CBr4 + _F2

a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
10.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

_Al +_HCl ⟶ _H2 +_AlCl3

a)
2, 6, 3, 2
b)

1,1,1,1

c)
4, 12, 3, 4
d)
2, 1, 4, 5
11.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

_CH4 + _O2 ⟶ _CO2 + _H2O

a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
12.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

_CF4 + _Br2 ⟶ _CBr4 + _F2

a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
13.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

__AgNO3 + __H2S ⟶ __Ag2S+ __HNO3

a)
2,1 --> 1,2
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
14.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

__H2 + __S ⟶ __H2S

a)
1,1 --> 1
b)
2,2 --> 2
c)
1,2 --> 1
d)
1,2 --> 2
15.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

__H2SO3 + __KOH ⟶ __H2O+ __K2SO3

a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
16.

Balance this equation...

Sb2S3 + O2 ⟶ Sb + SO2

a)

It is balanced as written

b)

Sb2S3 + 3O2 --> 2Sb + 3SO2

c)

Sb2S3 + O2 --> 2Sb + SO2

d)

What is Sb?

17.

Which of the following shows the correct way to balance the chemical equation? __Fe + __O2 ⟶ __Fe2O3

a)

4Fe + 3O2 ⟶ 2Fe2O3

b)

2 Fe + 3O2 ⟶ Fe2O6

c)

4 Fe + O6 ⟶ 2Fe2O3

d)
None of the options are correctly balanced.
18.

Balance this equation:  2Li + Cl2 ⟶ LiCl

a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
19.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

_Al +_HCl ⟶ _H2 +_AlCl3

a)

2, 6, 3, 2

b)

1, 1, 1, 1

c)

4, 12, 3, 4

d)

2, 1, 4, 5

20.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)?

_CH4 + _O2 ⟶ _CO2 + _H2O

a)

1,2,1,1

b)

2,1,2,1

c)

1,2,1,2

d)

0,2,0,2

21.

What set of coefficients balances the equation

using standard form (lowest whole number ratios)? _CF4 + _Br2 ⟶ _CBr4 + _F2

a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
22.

Which of the following correctly balances the equation

Mg(OH)2 ⟶ __________

a)

Mg(OH)2 ⟶ MgOH

b)

Mg(OH)2 ⟶

MgO + H2O

c)

Mg(OH)2 ⟶

MgO + H2

d)

Mg(OH)2 ⟶

Mg + H2O

23.

Balance the equation: Si(OH)4+NaBr ⟶ SiBr4+NaOH

a)

Si(OH)4+2NaBr

⟶ SiBr4+NaOH

b)

Si(OH)4+4NaBr ⟶ SiBr4+4NaOH

c)

Si(OH)4+NaBr ⟶ SiBr4+4NaOH

d)

Si(OH)4+2NaBr ⟶ SiBr4+2NaOH

24.

What is the sum of the coefficients when this chemical equation is balanced using standard form (lowest whole number ratios)?

_N2 + _H2 ⟶ _NH3

a)

3

b)

6

c)

5

d)

4

25.

What set of coefficients for H2O and HCl balances the equation using standard form (lowest whole number ratios?

PCl5  +  ___ H2O  ⟶  ___ HCl  +   H3PO4

a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
26.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

___ SeCl6 + ___ O2 → ___ SeO2 + ____Cl2

a)

1, 1, 1, 3

b)

2, 1, 2, 1

c)

1, 2, 1, 2

d)

2, 2, 2, 4

27.

When this reaction is balanced using the lowest whole number rations, Fe2O3 has the coeffficient _____ in the balanced equation.

a)

1

b)

2

c)

3

d)

4

28.

Balance this equation... Sb2S3 + O2 ⟶ Sb + SO2

a)
It is balanced
b)

Sb2S3 + 3O2 ⟶ 2Sb + 3SO2

c)

Sb2S3 + O2 ⟶ 2Sb + SO2

d)

2Sb2S3 + 6O2 ⟶ 4Sb + 6SO2

29.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

__Na + __H2O ⟶ __NaOH + __H2

a)

2,2 ⟶ 2,1

b)

4,4 ⟶ 4,1

c)

1,2 ⟶ 2,4

d)

1,2 ⟶ 2,1

30.

When this equation is balanced using lowest whole numbers, what is the sum of the coefficients?

__Ag2O ⟶ __ Ag +___O2

a)

7

b)

3

c)

5

d)

6

31.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

__SnO2 +__H2 ⟶ __Sn +__H2O

a)

1,1,2,1

b)

1,2,1,1

c)

1,2,1,2

d)

1,2,2,1

32.

When the following reaction is balanced using standard form, what is the coefficient in front of the carbon monoxide (CO)?

C + SO2 ⟶ CS2 + CO

a)

2

b)

3

c)

4

d)

5

33.

When this equation is balanced correctly using standard form, what is the coefficient for manganese (Mn)?

___Al + ___MnO ⟶ ___Al2O3 + ___Mn

a)

1

b)

2

c)

3

d)

4

34.

When this equation is balanced using lowest whole number ratios, what is the coefficient for NH4NO3?

(NH4)2SO4 + Ba(NO3)2 ⟶ NH4NO3 + BaSO4

a)

1

b)

2

c)

3

d)

4

35.

In the following chemical reaction, what product is represented by X?

2NaCl(aq) + X (g) ⟶ 2NaF(s) + Cl₂(g)

a)

Cl

b)

Na

c)

F₂

d)

2F

36.

Which of the following is the correctly balanced equation?

a)

C₂H₅OH + 2 O₂ → 2 CO₂ + 3 H₂O

b)

C₂H₅OH + 3 O₂ →

2 CO₂+ 2 H₂O

c)

C₂H₅OH+3 O₂ → CO₂+3 H₂O

d)

C₂H₅OH+ 3 O₂ →

2 CO₂+3 H₂O

37.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

___HCN + ___CuSO4 ⟶ ___H2SO4 + ___Cu(CN)2

a)

1, 1 ⟶ 2, 1

b)

1, 2, ⟶ 1, 2

c)

2, 1 ⟶ 1, 1

d)

2, 1 ⟶ 2, 1

38.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

___RbNO3 + ___BeF2 ⟶ ___Be(NO3)2 + ___RbF

a)

2, 1 ⟶ 1, 2

b)

1, 2 ⟶ 2, 1

c)

1, 2 ⟶ 1, 1

d)

2, 1 ⟶ 2, 1

39.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

___GaF3 + ___Cs ⟶___CsF + ___Ga

a)

3, 1 ⟶ 1, 1

b)

1, 1 ⟶ 3, 1

c)

3, 1 ⟶ 1, 3

d)

1, 3 ⟶ 3, 1

40.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

___AlBr3 + ___K2SO4 ⟶ ___KBr + ___Al2(SO4)3

a)

3, 2 ⟶ 1, 6

b)

2, 3 ⟶ 6, 1

c)

2, 3 ⟶ 4, 3

d)

1, 3 ⟶ 6, 2

41.

When this equation is balanced using lowest whole number ratios, what is the coefficient for LiCl?

___LiBr + ___Cl2 ⟶ ___Br2 + ___LiCl

a)

0

b)

1

c)

2

d)

3

e)

4

42.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

___AlCl3 + ___NaOH ⟶ ___Al(OH)3 + ___NaCl

a)

3, 1 ⟶ 3, 1

b)

1, 3 ⟶ 3, 3

c)

1, 1 ⟶ 3, 2

d)

1, 3 ⟶ 1, 3

43.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

___Ca + ___ YF3 ⟶ ___ Y + ___CaF2

a)

3, 2 --> 3, 2

b)

2, 3 --> 1, 3

c)

3, 2 --> 2, 3

d)

2, 3 --> 3, 1

44.

__BaF2 + ___K3PO4 ⟶ ___Ba3(PO4)2 + ___KF

When this equation is balanced using lowest whole number ratios, what coefficient goes in front of K3PO4?

a)
1
b)
2
c)
3
d)
4
45.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

____ P4 + ____ O2 ⟶ ____ P2O3

a)
1,3,2
b)
1,1,1
c)
1,2,3
d)
2,1,2
46.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

_SeCl6 +_ O2  ⟶ _ SeO2+ _Cl2

a)
1,2,1,2
b)
1,1,1,3
c)
1,2,1,1
d)
2,1,1,1
47.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

__N2 + __O2 ⟶ __NO

a)

1, 1, 1

b)

1, 1, 2

c)

2, 2, 2

d)

1, 2, 2

48.

When this equation is balanced using lowest whole number ratios, what is the sum of the coefficients?

___Al + ___O2 ⟶ ___Al2O3

a)

7

b)

11

c)

8

d)

9

49.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

C2H2+ O2 ⟶ CO2+ H2O

a)

2, 5, 2, 1

b)

2, 5, 4, 2

c)

5, 2, 4, 2

d)

2, 2, 5, 2

50.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

Ca(OH)2+ H3PO4 ⟶ CaPO4)2 +H2O

a)

3, 1, 1, 6

b)

2, 3, 1, 6

c)

3, 2, 1, 6

d)

1, 3, 2, 6

51.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

Ag+S8 ⟶ Ag2S

a)

8, 8, 16

b)

8, 1,16

c)

16, 1, 8

d)

1, 8, 16

52.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

Cr + O2 ⟶ Cr2O3

a)

2, 3, 4

b)

2, 4, 3

c)

3, 2, 4

d)

4, 3, 2

53.

Balance the the equation using

standard form (lowest whole number ratios)

​ ​ (a)   Cr + ​ (b)   O2 ⟶ ​ (c)   Cr2O3

​

Choose from the below words
4
3
2
1
5
6
54.

What set of coefficients balances the equation using

standard form (lowest whole number ratios)?

__ NaClO3 ⟶ __NaCl+ __O2

a)

3, 2, 2

b)

2, 1, 3

c)

2, 2, 3

d)

3, 1, 2

55.

Which of the following correctly balances the equation:

_AgNO3 + _Cu ⟶  _Cu(NO3)2 + _Ag

a)

    2 AgNO3 + 2 Cu   ⟶  3 Cu(NO3)2 + 1 Ag

b)

   2 AgNO3 + 1 Cu         ⟶ 

1 Cu(NO3)2 + 2 Ag

c)

      1 AgNO3 + 2 Cu        ⟶  2 Cu(NO3)2 + 1 Ag

d)

    3 AgNO3 + 2 Cu          ⟶  3 Cu(NO3)2 + 2 Ag

56.

Which coefficients for H2O and HCl correctly balance the equation:

PCl5 +_ H2O → _ HCl + H3PO4

a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
57.

Balance this equation: P4+O2  ⟶  P2O3

a)

3 P4+ O2 ⟶ 2 P2O3

b)

 P4+ O2 ⟶ 2 P2O3

c)

 P4+ 3 O2 ⟶ 2 P2O3

d)

 P4+ 2 O2 ⟶ 3 P2O3

58.

Balance the equation: Ag + H2S ⟶ Ag2S + H2

a)

Balanced

b)

Ag + H2S ⟶ 2 Ag2S + H2

c)

Ag + 2 H2S ⟶ Ag2S + H2

d)

2 Ag + H2S ⟶ Ag2S + H2

59.

Balance the equation: FeCl3 + NaOH ⟶ Fe(OH)3 + NaCl

a)

Balanced

b)

FeCl3 + 3 NaOH

⟶

Fe(OH)3 + NaCl

c)

FeCl3 + 3 NaOH

⟶

Fe(OH)3 + 3 NaCl

d)

FeCl3 + 2 NaOH

⟶

Fe(OH)3 + 3 NaCl

60.

Balance this equation...

Fe2O3 + C ⟶ Fe + CO2

a)

It is balanced

b)

Fe2O3 + 3C ⟶ 2Fe + 3CO2

c)

Fe2O3 + C ⟶ 2Fe + CO2

d)

Fe2O3 + C ⟶ Fe2 + CO3

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