C7: Metals Flashcards

1
Q

Test for Hydrogen

A

Squeaky ‘pop’ test

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2
Q

A more reactive metal…

A

…Will displace a less reactive metal from an aqueous solution of one of its salts.

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3
Q

Ionic Equations

A

An equation that shows only those ions or atoms that change in a chemical reaction.
Mg + CuSO4 -> MgSO4 + Cu
Mg + Cu2+ -> Mg2+ + Cu

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4
Q

Redox Reactions

A

The gain and loss of electrons

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5
Q

2 ways of extracting metal from metal ore?

A

Displacement with carbon

Electrolysis

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6
Q

Pure Metal Atomic Structure

A

> Organised in closely packed, regularly set out layers.
Contain a sea of free moving, delocalised electrons.
When heated, soft and easily shaped because the layers can easily slip over each other.

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7
Q

Why are alloys harder than the pure metals that they are made of?

A

Because they usually have controlled amounts of carbon mixed into their structure, which disrupts their regular layout and prevents the layers from sliding over one another.

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8
Q

How are metals held together?

A

Through stron electrostatic attraction between the free electrons and the positively charged ions.

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9
Q

Shape Memory Alloys

A

Mixture of metal which responds to changes in temperature.

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10
Q

Properties of copper.

A

> bendable but strong

> very conductive.

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11
Q

Bronze =

A

Copper + Tin

Tough and non-corrosive

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12
Q

Brass =

A

Copper + Zinc

Hard

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13
Q

Aluminium alloys are…

A

Lightweight but strong, used for aircrafts, armoured tanks etc.

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14
Q

Blast Furnace

A

The huge reaction vessels used in industry to extract iron from its core.

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15
Q

Components of a blast furnace and their jobs.

A
> iron ore (haematite)
-iron oxide
-a compound that contains iron
> coke
-carbon
-burns in air to produce heat, and reacts to form carbon monoxide (needed to reduce the iron oxide)
> limestone
-calcium carbonate
-helps to remove acidic impurities from the iron by reacting with them to form molten slag
> air
-oxygen
-allows the coke to burn, and so produces heat and carbon monoxide
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16
Q

Carbon Steels

A

Alloy of iron containing controlled, small amounts of carbon.

17
Q

High-Alloy Steels

A

Expensive alloy of Iron mixed with a relatively large proportion of other metals.

18
Q

Low-Alloy Steels

A

Alloy of Iron containing between 1-5% of other metals.