Mastering Chemical Equations: An Introductory Guide
Science
Year 8
14 questions
~28 mins
0 views0 downloads
About This Worksheet
A worksheet covering Balancing Chemical Equations for Year 8 students.
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Mastering Chemical Equations: An Introductory Guide
Subject: ScienceGrade: Year 8
Name:
Date:
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Untitled Worksheet
Grade Year 8
A
Questions
Answer all questions. Show your working where appropriate.
1.
What is the principle of conservation of mass?
[2 marks]2.
Why is it important to balance chemical equations?
[2 marks]3.
What is the chemical formula for water?
[1 mark]AH2O
BO2
CH2
DHO
4.
True or False: Balancing a chemical equation changes the substances involved.
[1 mark]5.
How many atoms of oxygen are present in 2H2O?
[1 mark]A1
B2
C3
D4
6.
Balance the following equation: Fe + O2 -> Fe2O3
[3 marks]7.
Match the following terms to their definitions:
[3 marks]1. Reactants
2. Products
3. Coefficient
ASubstances present at the start of a reaction
BA number placed in front of a chemical formula to balance the equation
CSubstances formed by a chemical reaction
8.
Order the steps in balancing a chemical equation:
[2 marks]1
2
3
4
5
9.
Fill in the blank: An equation is balanced when the number of atoms of each element is the same on both sides of the ______.
[1 mark]10.
True or False: The coefficients in a balanced chemical equation must be whole numbers.
[1 mark]11.
Explain why balancing chemical equations is crucial in real-world applications, such as manufacturing and environmental science.
[6 marks]12.
Identify the type of reaction: 2H2 + O2 -> 2H2O
[1 mark]13.
What do coefficients in a chemical equation represent?
[1 mark]14.
Which of the following is a balanced equation for the reaction of hydrogen and oxygen to form water?
[1 mark]AH2 + O2 -> H2O
B2H2 + O2 -> 2H2O
CH2 + 2O2 -> 2H2O
D2H2 + O2 -> H2O
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- Created
- 12/30/2025
- Updated
- 12/30/2025
- Type
- worksheet