Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > C1.3 > Flashcards

C1.3 Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

What is bioleaching?

A

~ Bacteria is used to grow on the low grade copper ore
~ Bacteria produce a solution as a by-product
~ The solution can then go through electrolysis or displacement to extract the metal

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

How does electrolysis work?

A

~ Two electrodes are added to a solution in the form of a salt
~ Positive ions are attracted to negative electrode
~ Negative ions are attracted to positive electrode
~ Metal can then be removed

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

What is displacement?

A

~ Scrap iron is put in a solution of a metal salt
~ Metal will coat itself around the outside of the scrap iron
~ Metal can then be extracted

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

What is the difference between low carbon steel and high carbon steel?

A

~ Low carbon steel is easy to shape

~ High carbon steel is hard and resistant to corrosion

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

What does steel and chromium produce?

A

Stainless steel

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

Why is stainless steel useful?

A

~ Doesn’t rust
~ Not very reactive
~ Not corrosive

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

Why are metals such as aluminium and gold turned into alloys with copper?

A

~ Makes them harder

~ Less expensive

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

What is an ore?

A

A type of rock containing a metal that’s economically worth extracting

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

Why are phytomining and bioleaching important?

A

They produce the pure metal from low grade ores

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

Give the symbol equation for a reduction reaction using carbon and a metal ore

A

2FeO + C -> 2Fe + CO2

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

What is Phytomining?

A

Where plants are absorbed to make metal compounds. Plants are then burned and the metal can be separated out from the ash produced

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

What metals can be extracted using reduction?

A

Those below carbon in the reactivity series

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

How is phytomining done?

A

~ By growing a certain type of plant on low grade copper ore
~ Some plants have the ability to take out the metal compounds from the ore and take it into their body tissue
~ The plants are then taken and burnt
~ Ash remains contain the metal which can be extracted using electrolysis or displacement

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

What are some properties of titanium and aluminium?

A

~ Low density

~ Resistant to corrosion

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

What are some properties of copper?

A

~ Good conductor of heat and electricity
~ Malleable
~ Not reactive with water, so can be used in piping

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

What is an alloy?

A

A mixture of metals

17
Q

Why is 100% pure metal not useful?

A

Too soft

18
Q

What is wrong with impure iron?

A

~ Brittle

~ Strong so can’t get compressed

19
Q

What is in the blast furnace?

A

~ Coke
~ Limestone
~ Iron oxide

20
Q

Where is iron produced?

A

In a structure called the Blast Furnace

21
Q

What is the first step to extracting metals?

A

Concentrating the ore, which removes some impurities and makes the ore have more metal inside

22
Q

Why are there problems with extracting copper?

A

~ Carbon reacting with copper produces impure copper so electrolysis must be used to make it pure
~ Copper rich ores are running out, making it expensive

23
Q

How are metals above carbon in the reactivity series extracted?

A

~ The ore is melted

~ Electricity is used to separate the metal and oxygen

24
Q

Why is no reaction required to remove oxygen from gold?

A

It’s so unreactive that it’s not found as an oxide, and can be found native in the ground

25
Q

How can a metal which is below carbon in the reactivity series be extracted?

A

It’s reacted with carbon because the carbon takes the oxygen from the metal

26
Q

How can low grade ore be extracted?

A

Phytomining / bioleaching

27
Q

How can high grade ores be extracted?

A

Smelting, then electrolysis / displacement

28
Q

What are the properties of transition metals?

A

~ Good conductors of heat and electricity

~ Malleable

29
Q

Why are gold, aluminium and copper not useful alone, and how can they be made more useful?

A

~ They’re too soft

~ They can be mixed with other metals to make them harder

30
Q

What is a use of titanium?

A

To make hip joints

31
Q

What are some uses of aluminium?

A

~ Aeroplane bodies

~ Power lines

32
Q

What are some uses of copper?

A

~ Cooking pots and pans

~ Piping

33
Q

Why should we recycle metals?

A

~ To save money and energy
~ To ensure all natural resources don’t get used up
~ To reduce the amount of mining which damages the environment

Chemistry (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions