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Year 9 Science > Patterns Of Reactivity > Flashcards

Patterns Of Reactivity Flashcards

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0
Q

Where do metals react in the environment?

A

With substances eg air, water or acids.

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1
Q

Which gas in the air reacts with metals most easily?

A

Oxygen

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2
Q

What are reactive metals?

A

Metals that react quickly and easily.

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3
Q

What are unreactive metals?

A

Metals that do not react very easily or quickly.

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4
Q

Where are the most reactive metals found?

A

On the left hand side of the periodic table.

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5
Q

Where are less reactive meals found?

A

In the centre of the periodic table.

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6
Q

Which the most reactive gas in air?

A

Oxygen

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7
Q

Which gas is not very reactive?

A

Nitrogen

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8
Q

What happens when metals react with oxygen in the air?

A

They form oxides.

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9
Q

What is the word equation when metals form oxides?

A

Metal + oxygen ➡️ metal oxide

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10
Q

What do metals react quickly with if they react with air?

A

Water

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11
Q

What happens when metals react with water?

A

They form hydrogen gas and a metal hydroxide.

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12
Q

What is the word equation for metals reacting with water?

A

Metal + water ➡️ metal hydroxide + hydrogen

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13
Q

What do metals that react quickly with water also react quickly with?

A

Air and acid

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14
Q

Some metals that don’t react with water….

A

React with acid

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15
Q

What do metals produce when they react with acids?

A

Hydrogen and a salt

16
Q

What is the word equation for metals and acids?

A

Metal + acid ➡️ salt + hydrogen.

17
Q

Sulphuric acid makes…

A

Sulphates

18
Q

Nitric acid makes…

A

Nitrates

19
Q

Hydrochloric acid makes…

A

Chlorides

20
Q

What is the reactivity series?

A

Metals can be placed into a reactivity series where the most reactive metals are placed at the top of the table. The reactivity series can also be used to predict whether reactions will occur.

21
Q

Name the first 11 metals in the reactivity series

A 
Potassium 
Sodium
Calcium
Magnesium
Aluminium 
Zinc
Iron
Lead
Copper
Silver 
Gold
22
Q

More reactive metals can…

A

Displace less reactive metals from their compounds.

23
Q

What happens in a displacement reaction?

A

The more reactive reactive metal will steal the other metals compound to form it’s own compound, leaving the other metal as a pure element.

24
Q

Example of a displacement reaction:

A

Iron + copper chloride ➡️ iron chloride + copper

25
Q

What happens if you react zinc chloride and iron?

A

No reaction.

26
Q

What can you use displacement reactions for? Give an example

A

To work out the order of the reactivity series. For example, zinc will displace lead from a compound, so we know that zinc is more reactive than lead.

27
Q

Metals used for construction need…

A

A low reactivity or they would corrode away.

28
Q

Aluminium has…

A

A natural protective oxide layer.

29
Q

Iron has…

A

To be protected from corrosion eg by painting.

30
Q

Low reactivity metals have…

A

Been known for thousands of years because they can be extracted by heating their compounds in a fire.

31
Q

More reactive metals are discovered by…

A

Electrolysis. This means they have been discovered in the last 200 years, since the invention of the electric battery.

32
Q

What is a very important property of metals?

A

Reactivity

33
Q

What is aluminium used for?

A

It is used for aircraft as it is very lightweight. Also it had a protective oxide layer to stop corrosion.

34
Q

What is bronze used for?

A

Sculptures. It has a low reactivity but would last for a long time. It is quite expensive but a cheaper metal like iron would rust easily. (Unless it is painted)

35
Q

What is the word equation for acid and metal carbonate?

A

Acid + metal carbonate ➡️ salt + water + carbon dioxide.

36
Q

What is iron used for?

A

For building structures. It isn’t light but doesn’t corrode which can make the structure expensive. Normally it is cheap to use though.

37
Q

What is gold used for?

A

Gold is used for rings because it doesn’t corrode and also looks attractive. It is expensive because it is rare.

Year 9 Science (8 decks)

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