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Flashcards in Chemistry 2 Deck (28)
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1
Q

which metals can rust

A

only iron, rusting is what corrosion is called for iron, for other metals it is just corrosion

2
Q

What is stainless steel

A

An alloy of iron and Nickel which resists corrosion, it is use for making cutlery

3
Q

What sort of reaction is rusting

A

Oxidation

4
Q

Name three allotropes of carbon

A

Graphite, Graphene, diamond, fullerenes

5
Q

What is corrosion

A

chemical reactions between metals and substances in the enviroment which damages the metal

6
Q

Name two alloys of copper

A

Bronze and Brass

7
Q

what is corrosion of iron called

A

Rusting

8
Q

What is steel

A

An alloy of iron and carbon

9
Q

What was phase 1 of the earth’s atmosphere

A

Lots of volcanoes, producing steam and carbon dioxide, atmosphere almost all carbon dioxide, then the earth cooled and the vapour condensed to form oceans

10
Q

Name three barrier methods to present rust

A

Paint, Oil or grease, plastic coating

11
Q

What is graphene used for

A

Electronics and it can be added to other materials to give them stength (composites)

12
Q

What are fullerenes

A

molecues of carbon attoms which hollow shapes

13
Q

Name uses for Bronze

A

Statues and ships propellers

14
Q

Name two allotropes of Carbon have dissasociated electrons

A

Graphite and Graphene

15
Q

name two types of steel

A

High carbon Steel (0.22-2.5% carbon) and low carbon steel (0.1-0.3% carbon)

16
Q

What two features of a metal are affected by corrosion

A

strenth and appearance

17
Q

what is the word equation for rusting

A

IRON + WATER + OXYGEN –> HYDRATED ITON (III) OXIDE

18
Q

Is 18 catar gold an alloy

A

Yes it is an alloy og Gold and Copper

19
Q

Name two uses for brass

A

Imusical instruments and taps

20
Q

What was the first fullerene to be discovered

A

Buckminsterfullerene (C60)

21
Q

what are the two methods to prevent rust

A

barrier and sacraficial protection

22
Q

What was phase 2 of the earth’s atmosphere

A

plants and algae grow in the oceans, converted carbon dioxide to Oxygen (photosynthesis), Nitrogen produced by bacteria, plants move to the lans Oxggen levels increase

23
Q

Does NaCL (aq) (i.e. salt water) act as a catalyst for rusting

A

Yes

24
Q

Why is there a lot og Nitorgen in the atmosphere

A

Because it is unreactive so it just collects over time

25
Q

What needs to be present for Iron to Rust

A

Water and Oxygen

26
Q

What was phase 3 of the earth’s atmosphere

A

Oxygen built up allowing complex organisma to evolve, the oxygen created the ozone layer which blocks harmful UV rays, almost no carbon dioxide left

27
Q

name three metals which can be used to sacraficially protect iron

A

Zinc, Magnesium, Aluminium

28
Q

How does sacraficial protection for rusting work

A

A more reactive metal is placed near the iron and gets oxidised instead