Free Printable Hon Bio-Unit 2-Balancing equations

Worksheets

Hon Bio-Unit 2-Balancing equations

Total questions: 21

Worksheet time: 20mins

Name

Class

Date

What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

Reactants

Yields

Products

Chemical equation

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

Reactants

Yields

Products

Chemical Equation

What is the total number of atoms present in 5Na₃PO₄?

How many Mn atoms are found in the following compound?

2MnO₄

What is the little number after an element in a chemical equation called?

Example: H₂

Coefficient

Atom

Subscript

Equation

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

YES

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

Coefficient

Atom

Subscript

Equation

Balance this equation:

H₂ + Cl₂ ---> HCl

It is balanced.

H₂ + Cl₂ ---> 2HCl

3H₂ + Cl₂ ---> 6HCl

H₂ + 3Cl₂ ---> 6HCl

Balance this equation:

HgO ---> 2Hg + O₂

It is balanced.

2HgO ---> 2Hg + O₂

2HgO ---> Hg + O₂

HgO ---> Hg + 2O₂

10.

What is the Law of Conservation of Mass?

It states that matter cannot be created or destroyed.

It states that energy cannot be created or destroyed.

It states that matter can be created or destroyed.

It states that sound can be created or destroyed.

11.

How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl₂ + H₂

12.

What are the numbers that you CANNOT change in a chemical equation?

Coefficient

Products

Reactants

Subscripts

13.

Balance the following equation:

___ H₂+ ___ O₂→___ H₂O

1, 1, 3

2, 2, 2

1, 2, 1

2,1, 2

14.

What is the right ratio of chemicals for the balanced chemical equation?__Na + __H₂O --> __NaOH + __H₂

2,2 --> 2,1

4,4 --> 4,1

1,2 --> 2,4

1,2 --> 2,1

15.

What is the right ratio of chemicals for the balanced chemical equation?

__CO + __Fe₂O₃--> __Fe + __CO₂

3,1 --> 2,3

3,2 --> 1,1

3,2 --> 2,4

3,2 --> 2,1

16.

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CH₄ + __O₂ --> __CO₂+ __H₂O

2,1 --> 2,1

1,2 --> 1,1

1,2 --> 1,2

1,2 --> 2,1

17.

What is the right ratio of chemicals for the balanced chemical equation?

__AgNO₃ + __H₂S --> __Ag₂S+ __HNO₃

2,1 --> 1,2

1,2 --> 1,1

1,2 --> 1,2

1,2 --> 2,1

18.

What is the right ratio of chemicals for the balanced chemical equation?

__H₂ + __S --> __H₂S

1,1 --> 1

2,2 --> 2

1,2 --> 1

1,2 --> 2

19.

What is the right ratio of chemicals for the balanced chemical equation?

__H₂SO₃ + __KOH--> __H₂O+ __K₂SO₃

2,1 --> 2,1

1,2 --> 1,1

1,2 --> 1,2

1,2 --> 2,1

20.

What is the right ratio of chemicals for the balanced chemical equation?

__MnO₂ + __HCl --> __MnCl₂ + __H₂O __Cl₂

4,1 --> 2,1,2

1,2 --> 1,1,4

1,4 --> 1,2,1

1,4 --> 2,2,1

21.

What is the right ratio of chemicals for the balanced chemical equation?

__FeCl₃ + __Ca(OH)₂ --> __Fe(OH)₃ + __CaCl₂

4,3--> 2,1

3,2 --> 3,1

2,3 --> 2,2

2,3 --> 2,3

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Hon Bio-Unit 2-Balancing equations

Total questions: 21

Worksheet time: 20mins

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