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8eb1 Oxidation

The document discusses oxidation reactions, where metals react with oxygen to form metal oxides. It provides examples of magnesium and copper reacting with oxygen to form magnesium oxide and copper oxide respectively. It also addresses the common misconception that mass appears to increase in these reactions, and explains that the oxygen comes from the air.

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Hakim Khan
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101 views2 pages

8eb1 Oxidation

The document discusses oxidation reactions, where metals react with oxygen to form metal oxides. It provides examples of magnesium and copper reacting with oxygen to form magnesium oxide and copper oxide respectively. It also addresses the common misconception that mass appears to increase in these reactions, and explains that the oxygen comes from the air.

Uploaded by

Hakim Khan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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8 Eb-1 Oxidation

Name Class Date

1 Hydrogen and oxygen react to form water.

a Colour the oxygen atoms in red. Colour the hydrogen atoms in grey.

a How many hydrogen atoms are there in all the reactants? 4 b How many hydrogen atoms

are there in all the products? 4 c How many oxygen atoms are there in all the reactants? 2

d How many oxygen atoms are there in all the products? 4

e If the masses of oxygen and hydrogen were measured before the reaction, and the mass
of water formed was measured after the reaction, what would we see? Tick (✔) the
correct box.

● total mass of hydrogen and oxygen greater than mass of water

● total mass of hydrogen and oxygen same as mass of water

● total mass of hydrogen and oxygen less than mass of water

2 When a metal reacts with oxygen, the metal oxide is formed. Write down the products of these
reactions.

a magnesium + oxygen  magnesium oxide b copper + oxygen  copper oxide

c What is the name of this kind of reaction? oxidisation

3 Sometimes it seems as if mass has been gained in a reaction.

The zinc has combined with oxygen to form zinc oxide.

Where did the oxygen come from? the oxygen came from the air
I can…
● state what happens to mass in an oxidation reaction ● describe
oxidation reactions of metals.

© Pearson Education Ltd 2014. Copying permitted for


purchasing institution only. This material is not copyright free. 6

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