Reactions Of Metals With Oxygen Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What does it mean if there is a triangle over the chemical reaction arrow in a chemical equation?

A

Applying heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What two types of results can you get?

A

Qualitative

Quantitative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are qualitative results?

A

Results that use the five senses, i.e. What does it look like

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are quantitative results?

A

Results that use numbers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What three things can you do to prevent corrosion?

A

Painting/greasing/oiling
Electroplating
Galvanising

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What will happen to a metal left in the presence of Oxygen?

A

It will form a metal oxide through a chemical reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What colour is copper oxide that occurs naturally?

A

Green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What colour is copper oxide that forms in the presence of heat?

A

Black

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What flame occurs in the combustion of copper?

A

Green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does iron oxide look like when it reacts naturally?

A

Reddish brown flakes called rust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What does iron oxide look like when it combusts?

A

Dark grey

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the oxide formed between Iron and Oxygen react with heat?

A

Magnetite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the chemical formula for rust?

A

Fe2O3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What colour is magnesium oxide?

A

White ash

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the reaction of magnesium oxide like?

A

Bright white flash

Rapid reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What two metals are unlikely to react with oxygen?

A

Gold

Silver

17
Q

What protects fruit from an oxygen attack?

A

Their skin/peel

18
Q

What speeds up the rusting process? (Catalyst)

A

Water

19
Q

Why is rusting a bad thing?

A

It weakens iron and steel, which are used as supports for buildings, cars etc.

20
Q

What way can the rusting process be sped up even more?

A

Impurities (like salt) can be mixed in the water being used as the catalyst

21
Q

Why are metals like aluminium and chromium being used more often?

A

They are not damaged by oxygen attacks.

22
Q

How are aluminium and chromium protected?

A

The oxides of these metals form a layer (patina) around the metal, protecting the rest of the metal from the Oxygen

23
Q

What three methods can be used to protect iron from rusting?

A

Painting/greasing/oiling
Electroplating
Galvanising

24
Q

What is electroplating?

A

A negative current is sent through a plate of iron. The charged plate is then dipped into a bath of aluminium/chromium/ gold etc. These metals are attracted to the negatively charged iron, and so they coat the iron.

25
Q

What is galvanising?

A

When an iron plate is dipped into a bath of zinc

26
Q

Why does galvanising work?

A

Zinc oxide will form an extra layer around the zinc and zinc oxide, protecting both metals

27
Q

What colour is copper naturally?

A

Orange

28
Q

What flame is produced during the reaction between iron and oxygen in the presence of heat?

A

Orange sparks

29
Q

What is a patina?

A

A layer of metal oxide that forms on the metal

30
Q

What happens to water when it boils?

A

Oxygen gas is evaporated

The water is less likely to cause lots of rust

31
Q

What compound absorbs moisture?

A

Calcium chloride