Chemistry

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Give three properties of metals.
Strong, bendy and conducts heat and electricity.
1 of 10
Describe the process of purifying copper by electrolysis.
The electrons are pulled off copper atoms at the anode (the positive electrode) causing them to go into the solution Cu2+ ions. The Cu2+ ions near the cathode (the negative electrode) gain electrons+turn back into copper atoms.
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What is calcium hydroxide used for?
It is an alkali which can be used to neutralise acidic soil.
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Name 3 uses of limestone.
Cement, mortar and concrete.
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List 3 ways of reducing acid rain.
Sulfur can be removed from fuels, reduce the usage of fossil fuels and replace petrol and diesel with low-sulfur versions.
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What is crude oil made of?
Crude oil is a mixture of many different compounds. Most of the compounds are hydrogen molecules.
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What is an element?
They consist of 1 type of atom only.
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What is a compound?
When different elements react, atoms form chemical bonds with other atoms to form compounds.
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What is ionic bonding?
A compound which is formed from a metal and a non-metal.
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What is covalent boding?
A compound formed from non-metals.
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Card 2

Front

Describe the process of purifying copper by electrolysis.

Back

The electrons are pulled off copper atoms at the anode (the positive electrode) causing them to go into the solution Cu2+ ions. The Cu2+ ions near the cathode (the negative electrode) gain electrons+turn back into copper atoms.

Card 3

Front

What is calcium hydroxide used for?

Back

Preview of the front of card 3

Card 4

Front

Name 3 uses of limestone.

Back

Preview of the front of card 4

Card 5

Front

List 3 ways of reducing acid rain.

Back

Preview of the front of card 5
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