Free Printable Balancing chemical reactions

Worksheets

Balancing chemical reactions

Total questions: 23

Worksheet time: 23mins

Name

Class

Date

How confident are you in balancing equations?

I got this!

Mostly Good.

Still working on it.

Mostly Lost

(NH₄)₂Cr₂O₇ How many H are in this atom?

PCl₅ +H₂O --> POCl₃ +HCl. How many chlorine (Cl) atoms?

Reactants: 5; Products: 3

Reactants 5; Products 5

Reactants 5: Products 4

Reactants 3; Products 5

Which option is correctly balanced?

Fe + H₂O --> Fe₃O₄ + H₂

3 Fe + H₂O --> Fe₃O₄ + H₂

3 Fe + 4 H₂O --> Fe₃O₄ + 4 H₂

3 Fe + 2 H₂O --> Fe₃O₄ + H₂

Which Option is Correctly Balanced?

Hg + O₂ --> Hg₂O₂

2 Hg + 2O₂ --> Hg₂O₂

2 Hg + O₂ --> Hg₂O₂

Hg + 2 O₂ --> Hg₂O₂

In chemical reactions, what does the principle of conservation of mass mean?

Matter is not created or destroyed.

The total mass of the reactants is greater than the total mass of the products.

The total mass of the reactants is less than the total mass of the products.

Matter is not changed.

How many atoms of Carbon are in the following formula?

3C₂H₆

What are the coefficients that will balance the skeleton equation below?

__Na + __F₂ → __NaF

1, 2, 1

2, 1, 2

1,1,1

2,2,2

What are the coefficients that will balance the skeleton equation below?

__Na + __MgF₂ → __NaF + __Mg

2,1,1,2

1,2,1,2,

2, 1, 2, 1

1,2,2,1

10.

What are the coefficients that will balance the skeleton equation below?

___N₂ + __H₂ → __NH₃

1,3,2

1,2,3

3,2,1

1,2,1

11.

What are the coefficients that will balance the skeleton equation below?

__Sn + __HF → __SnF₂ + __H₂

2,1,1,2

1, 2, 1, 1

2,1,2,1

1,2,1,2

12.

What are the coefficients that will balance the skeleton equation below?

__Fe +__O₂ → __Fe₂O₃

3,4,2

4, 3, 2

2,3,4

4,2,3

13.

What are the coefficients that will balance the skeleton equation below?

__MgS + __O₂ → __MgO + __SO₂

3,2,2,3

2,3,2,2

2,3,2,3

3,2,2,1

14.

What are the coefficients that will balance the skeleton equation below?

__CH₄ + __O₂ → __CO₂ + __H₂O

2,1,2,1

2,1,1,2

1,2,1,2

1,2,2,1

15.

__Na + __Cl₂ --> __NaCl

1,1,2

2,1,2

2,1,1

already balanced

16.

__H₂O₂ --> __H₂O + __O₂

already balanced

2,1,1

2,2,1

2,1,2

17.

__C₆H₁₂O₆ + __O₂ --> __H₂O + __CO₂

1,6,6,6

already balanced

1,6,1,6

2,12,12,12

18.

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H₂O --> __NaOH + __H₂

2,2 --> 2,1

4,4 --> 4,1

1,2 --> 2,4

1,2 --> 2,1

19.

Balance this equation:
MgCl₂ --> Mg₄+ Cl₂

It's already balanced.

4MgCl₂ --> Mg₄+ 4Cl₂

4MgCl₂ --> Mg₄+ 5Cl₂

20.

Balance this reaction: ____ BaS + ____ PtF₂ ---> ____ BaF₂ + ____ PtS

1,1,1,1

1,2,1,1

1,1,1,2

2,1,1,1

21.

How many Oxygen atoms do I have in the following two compounds?

$2\left(NH_4\right)_3PO_4$

22.

How many Hydrogen atoms do I have in the following two compounds?

$2\left(NH_4\right)_3PO_4$

23.

What number do I need to balance the following chemical reaction?

$C_4H_8+$ _ $O_2\rightarrow4CO_2+4H_2O$

100 %

Balancing chemical reactions

Total questions: 23

Worksheet time: 23mins

Similar Resources on Wayground