Free Printable Balance Chemical Equations

Worksheets

Balance Chemical Equations

Total questions: 25

Worksheet time: 48mins

Name

Class

Date

How many Hydrogen are in 4H₂O?

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

4Fe + 3O₂ -> 2Fe₂O₃

2 Fe + 3O₂ -> Fe₂O₆

4 Fe + O₆ -> 2Fe₂O₃

None of the options are correctly balanced.

What does the Law of Conservation of Mass state?

Matter cannot be gained or lost in a chemical reaction.

Matter can only be lost in a chemical reaction.

Matter can only be gained in a chemical reaction.

Matter can be gained and lost in a chemical reaction.

What is the total number of atoms present in 5Na₃PO₄

Balance this equation-
__P₄+ __O₂--> __P₂O₃

it is already balanced

2, 1, 3

1, 2, 3

1, 3, 2

Balance this equation
_Al +_HCl --> _H₂+_AlCl₃

2, 6, 3, 2

it is already balanced

4, 12, 3, 4

2, 1, 4, 5

Balance this equation.
_Mg + _Cl₂--> _MgCl₂

1, 2,1

already balanced

2,1,1

1,1,2

Balance this equation.
_CF₄+ _Br₂-- _CBr₄+ _F₂

2,1,2,1

1,2,2,1

1,2,1,2

2,2,2,2

Balance this equation.
_CH₄ + _O₂--> _CO₂+ _H₂O

1,2,1,1

2,1,2,1

1,2,1,2

0,2,0,2

10.

Balance this equation, AlCl₃+ NaOH → Al(OH)₃ + NaCl

3,1,3,1

1,3,3,1

1,1,1,3

1,3,1,3

11.

Balance the following equation: Cr(s) + Fe(NO₃)₂(ag) → Fe(s) + Cr(NO₃)₃ (ag)

2,3,3,2

2,3,2,3

4,6,6,2

1,3,3,1

12.

Which problem is balanced?

PbO₂ + 2H₂

SO₂ + H₂0 --> H₂SO₄

2Na + 2H₂O --> 2NaOH + H₂

13.

Balance this equation.
_SnO₂+_H₂-->_Sn +_H₂O

1,1,2,1

1,2,1,1

1,2,1,2

1,2,2,1

14.

Balance this equation
_Al +_HCl --> _H₂+_AlCl₃

2, 6, 3, 2

it is already balanced

4, 12, 3, 4

2, 1, 4, 5

15.

How many atoms of carbon (C) are in C₆H₁₂O₆?

16.

What is the left part of a chemical equation called?
2H_{2 +}O₂ --> 2H₂O

Reactants

Products

Yields

Chemical Equation

17.

What is the right part of a chemical equation called...
2H_{2 +}O₂ --> 2H₂O

Reactants

Products

Yields

Chemical Equation

18.

Balance this equation-
__P₄+ __O₂--> __P₂O₃

it is already balanced

2, 1, 3

1, 2, 3

1, 3, 2

19.

Balance this equation.
_Mg + _Cl₂--> _MgCl₂

1, 2,1

already balanced

2,1,1

1,1,2

20.

What is the correct equation?

Na + HNO3 => NaNO3 + H2

2Na + HNO3 => NaNO3 + H2

2Na + 2HNO3 => NaNO3 + H2

2Na + 2HNO3 => 2NaNO3 + H2

21.

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

Reactants

Products

Yields

Chemical Equation

22.

Identify the following chemical reaction.

2 NaBr + 1 Ca(OH)₂ ----> 1 CaBr₂ + 2 NaOH

Synthesis (or combination)

Decomposition

Single displacement

Double displacement

23.

Identify the following chemical reaction.

Pb + FeSO₄ ----> PbSO₄ + Fe

Synthesis (or combination)

Decomposition

Single displacement

Double displacement

24.

What reaction has the following general formula:

AB --> A + B

Synthesis

Decomposition

Single Replacement

Double Replacement

Combustion

25.

What reaction has the following general formula:

A + B --> AB

Synthesis

Decomposition

Single Replacement

Double Replacement

Combustion

100 %

Balance Chemical Equations

Total questions: 25

Worksheet time: 48mins

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