3.5 Extracting Metals

3.5 Extracting Metals

At the end of this lesson, you should be able to;

• Use the reactivity series to decide which metals can be extracted from their ores by heating with carbon.

• Calculate the amounts of metal in ores

Audio Response

What stood out to you from this video?

Open Audio Recorder

Multiple Choice

Which of these items are made from steel?

• Aluminum, copper, plastic
• Glass, wood, ceramic
• Gold, silver, bronze
• Knives, scissors, car parts

Multiple Choice

True or False: Steel is mainly iron.

• True
• False

Multiple Choice

Where does iron come from?

• Iron is obtained from trees.
• Iron is found in the sky.
• Iron is obtained from iron ores.
• Iron is created by magic.

Multiple Choice

True or False: You can find Iron, Fe, the element on its own in the Earth's crust.

• False
• Partially true
• Sometimes
• True

Multiple Choice

What is an ore?

• A type of rock that contains minerals with important elements
• A type of cloud that brings rain
• A type of fruit that grows on trees
• A type of bird that lives in the ocean

Drag and Drop

Fill in the blanks: In the Earth's ​

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, iron is ​

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to other ​

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in compounds. In many of these compounds iron is joined to ​

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. These are ​

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oxides.

Drag these tiles and drop them in the correct blank above

crust

joined

oxygen

Iron

elements

Dropdown

Complete the sentence; Most ​

Select answer

oxide is mixed with other compounds in ​

Select answer

.

A rock you can ​

Select answer

a ​

Select answer

from is called an ​

Select answer

.

Multiple Choice

True or false: Iron ore is a mixture of iron oxide and other compounds.

• True
• Partially true
• False

Multiple Choice

How are metals extracted from ores?

• Metals are extracted from ores by boiling
• Metals are extracted from ores by freezing
• Metals are extracted from ores through processes like smelting, leaching, and electrolysis.
• Metals are extracted from ores by evaporating

Drag and Drop

Fill in the blanks:

There are ​

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main stages in ​

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iron from its ore. These are;

1 Separate ​

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from the compounds it is mixed with .

2 Use ​

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to extract ​

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from iron oxide.

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iron oxide

chemical reactions

two

extracting

iron

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Fill in the blanks:

When extracting iron from its ore, the ​

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reactions involve ​

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iron oxide with charcoal. ​

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is a form of ​

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. It is ​

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, and easy to get hold of.

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heating

Charcoal

carbon

cheap

chemical

Multiple Choice

Which metal oxides react with carbon?

• Zinc oxide (ZnO)
• Copper oxide (CuO), and lead oxide (PbO)

• Aluminum oxide (Al2O3)
• Iron oxide (Fe2O3)

Multiple Choice

True or False: Carbon is a non-metal.

• True
• False

Drag and Drop

Fill in the blanks:

Any metal that is below ​

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in the ​

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series can be ​

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from its compounds by carbon. You can heat ​

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with ​

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powder.

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carbon

reactivity

displaced

carbon powder

copper oxide

Multiple Choice

True or false: Carbon displaces copper from copper oxide.

• Maybe
• True
• Sometimes
• False

Match

Match the following:

• carbon

• copper oxide

• copper

• carbon dioxide

C(s)

2CuO(s)

2Cu(s)

CO2(g)

• C(s)

• 2CuO(s)

• 2Cu(s)

• CO2(g)

Multiple Choice

True or False: You can also heat carbon with lead oxide.

• False
• Sometimes
• Maybe
• True

Multiple Choice

Can carbon extract any metal from its compounds?

• Sometimes
• No
• Yes
• Rarely

Drag and Drop

Fill in the blanks:

You ​

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use carbon to get ​

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from aluminium oxide. This is because aluminium is more ​

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than carbon. It is ​

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carbon in the reactivity ​

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.

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aluminium

reactive

above

series

cannot

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Fill in the blanks:

Gold always ​

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as the element itself. It does not ​

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compounds because it is very ​

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. The gold just needs ​

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from the ​

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it is mixed with.

Drag these tiles and drop them in the correct blank above

exists

form

unreactive

separating

substances

Open Ended

Research: How much ore was used by the world in 2023?

Multiple Choice

What is ore waste?

• Waste material generated during the processing of minerals
• Material extracted during mining operations that does not contain enough valuable minerals to be processed further.
• Material extracted during mining operations that contains valuable minerals
• Material extracted during mining operations that is highly valuable

Dropdown

Complete the sentence below with the correct options from the dropdown.

An ore is a ​

Select answer

that you can extract metal from. Most metals exist in the Earth's crust as ​

Select answer

. These are ​

Select answer

with other substances in ores.

Multiple Choice

Complete the sentence below Most metals exist in the Earth's crust as ​ ____.

• Compounds

• Elements

• Mixtures

• Solutions

Multiple Choice

Complete the sentence below;

An ore is a ​ ___ that you can extract metal from.

• rock
• substance

Multiple Choice

An ore contains 6% copper. Calculate the mass of copper in 100 kg of this ore.

• 7 kg
• 6 kg
• 5 kg

Multiple Choice

Use the reactivity series to write the balanced symbol equation for the reaction of carbon with zinc oxide. Include state symbols.

• C(s) + ZnO(s) -> Zn(s) + CO(g)
• C(s) + ZnO(s) -> ZnO(s) + CO2(g)
• C(s) + ZnO(s) -> ZnO(l) + CO2(g)
• C(s) + ZnO(s) -> Zn(s) + CO2(g)

Audio Response

Audio:

Explain why some metals can be extracted from compounds by heating with carbon, and why some cannot.

Open Audio Recorder

Drag and Drop

Fill in the blanks: Iron ore from ​

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contains different ​

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of iron, Companies ​

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iron from ores ​

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between ​

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.

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16% and 70% iron

amounts

different places

extract

containing

Multiple Choice

Some metals, such as aluminium, are extracted from their ores using electrolysis.

Why are some metals extracted using electrolysis?

• They are native metals

• They are more reactive than carbon

• They have low melting points

• They conduct electricity

Multiple Choice

A reaction took place between iron sulfate and magnesium.

iron(II) sulfate + magnesium → magnesium sulfate + iron

Which species has been oxidised?

• Iron

• Magnesium

• Sulfur

• None of the above

Multiple Choice

What term defines "A metal bonded to something else in a high enough quantity to make it worth extracting"

• Ore

• Native

• Oxide

• Carbonate

Multiple Choice

What element is used to extract less reactive metals?

• Carbon

• Nitrogen

• Oxygen

• Boron

Multiple Choice

Which of these is a native metal?

• Gold (Au)

• Potassium (K)

• Iron (Fe)

• Tin (Sn)

Multiple Choice

What term defines "A metal that is found unbonded to anything"

• Ore

• Native

• Oxide

• Carbonate

Multiple Choice

Which statement is correct about extraction of iron from its ore?

• Iron is more difficult to extract than copper
• Iron is the easiest metal to extract
• Iron cannot be extracted from its ore

Multiple Choice

Select the true statement.

• Any metal that is below carbon in the reactivity series can be displaced from its compounds by carbon.

• Any metal that is above carbon in the reactivity series can be displaced from its compounds by carbon.

• Any metal that is below carbon in the reactivity series can not be displaced from its compounds by carbon.

Multiple Choice

Select the correct explanation.

• Iron can not be displaced from its compounds by carbon as it more reactive than carbon.

• Iron can be displaced from its compounds by carbon as it more reactive than carbon.

• Iron can not be displaced from its compounds by carbon as it less reactive than carbon.

• Iron can be displaced from its compounds by carbon as it less reactive than carbon.

Multiple Choice

Complete the word equation.

Iron oxide + Carbon -> ?

• Iron oxide + Iron

• Iron oxide + Carbon dioxide

• Iron + Carbon dioxide

• Iron dioxide + Carbon

Multiple Choice

Select a disadvantage of extracting metals using carbon.

• iron is produced.

• Carbon dioxide is produced.

• Oxygen is used.

• The charcoal gets really hot.

Multiple Choice

Gold is less reactive than carbon, but does not need to be extracted with charcoal. Select the correct explanation for why,

• Gold always exists in a compound because it is very unreactive.

• Gold always exists as the element itself. It does not form compounds because it is very reactive.

• Gold always exists as the element itself. It forms compounds because it is very unreactive.

• Gold always exists as the element itself. It does not form compounds because it is very unreactive.

Multiple Choice

A high grade ore is one that contains a _________ amount of metal.

• small

• large

Multiple Choice

How do we extract iron from its ore?

• Electrolysis

• We don't - it's found pure

• Reduction with carbon

• Reduction with hydrogen

Multiple Choice

What is the chemical symbol for Iron?

• Ir

• I

• F

• Fe