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Chemical Reactions For KS3 - Worksheet

The document provides a worksheet on chemical reactions for Key Stage 3 students. It includes links to videos on related topics like acids and alkalis, elements compounds and mixtures, and reactivity series. The worksheet then lists questions to test students' understanding of different chemical reaction types, why burning wood is a chemical reaction, the elements in hydrocarbons, conservation of mass, disadvantages of burning fossil fuels, products of neutralization reactions, differences between thermal decomposition and combustion reactions, and examples of common oxidation reactions. Answers to the questions are provided at the end.

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1K views3 pages

Chemical Reactions For KS3 - Worksheet

The document provides a worksheet on chemical reactions for Key Stage 3 students. It includes links to videos on related topics like acids and alkalis, elements compounds and mixtures, and reactivity series. The worksheet then lists questions to test students' understanding of different chemical reaction types, why burning wood is a chemical reaction, the elements in hydrocarbons, conservation of mass, disadvantages of burning fossil fuels, products of neutralization reactions, differences between thermal decomposition and combustion reactions, and examples of common oxidation reactions. Answers to the questions are provided at the end.

Uploaded by

madam
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Chemical Reactions for KS3 - Worksheet

Here are some links to videos on related topics.

Acids & Alkalis ​https://stemlearning.wistia.com/medias/h5g4v5x1vy

Elements, Compounds and Mixtures ​https://stemlearning.wistia.com/medias/ud8ek2pgsv

Reactivity Series ​https://stemlearning.wistia.com/medias/c89zz4mgi4

Questions on Chemical reactions

1. Name the type of reaction:


a. Magnesium + oxygen → Magnesium oxide

………………………………………………………………..

b. Copper carbonate → copper oxide + carbon dioxide

………………………………………………………………..

c. Nitric acid + sodium hydroxide → sodium nitrate + water

………………………………………………………………..

d. Methane + oxygen → carbon dioxide + water

………………………………………………………………..

e. Copper sulfate + zinc → zinc sulfate + copper

………………………………………………………………..

2. Why is burning wood a chemical reaction?

………………………………………………………………..

3. Hydrocarbons are fuels, which two elements do they contain?

………………………………………………………………..

4. Explain what is meant by the term ‘conservation of mass’.

………………………………………………………………..

5. List two disadvantages of burning fossil fuels.

………………………………………………………………..

Chemical
Reactions for KS3
6. What are the two products of a neutralisation reaction between an acid and an alkali.

………………………………………………………………..

7. What is the difference between a thermal decomposition reaction and a combustion


reaction?

………………………………………………………………..

8. Name two common oxidation reactions.

………………………………………………………………..

Chemical
Reactions for KS3
Chemical Reactions for KS3 - Worksheet (Answers)

1. Name the type of reaction:


a. Magnesium + oxygen → Magnesium oxide
Oxidation
b. Copper carbonate → copper oxide + carbon dioxide
Thermal decomposition
c. Nitric acid + sodium hydroxide → sodium nitrate + water
neutralisation
d. Methane + oxygen → carbon dioxide + water
Combustion
e. Copper sulfate + zinc → zinc sulfate + copper
Displacement
2. Why is burning wood a chemical reaction?
The wood reacts with oxygen to produce lots of heat energy and new substances are
formed
3. Hydrocarbons are fuels, which two elements do they contain?
Hydrogen and carbon
4. Explain what is meant by the term ‘conservation of mass’.
Matter cannot be created or destroyed. There are the same number of atoms of each
element in the products and reactants.
5. List two disadvantages of burning fossil fuels.
Global warming and acid rain
6. What are the two products of a neutralisation reaction between an acid and an alkali.
Salt and water
7. What is the difference between a thermal decomposition reaction and a combustion
reaction?
Thermal decomposition only has one reactant, in combustion reaction there are two
reactants and one must be oxygen.
8. Name two common oxidation reactions.
Rusting and milk going sour.

Chemical
Reactions for KS3

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