C2C - Extracting Metals

Question 0

Why after extraction can copper not be used ?

Answer 0

It’s not pure enough

Question 1

How can copper be extracted ?

Answer 1

Heating copper ore with carbon

Question 2

What’s the problems with unpure copper ?

Answer 2

It won’t conduct very well

Question 3

What is the name of the process in which pure copper is obtained ?

Answer 3

Electrolysis

Question 4

What does electrolysis mean ?

Answer 4

The splitting up of something using electricity

Question 5

What is the copper immersed in ?

Answer 5

A liquid called the electrolyte which conducts electricity

Question 6

What are electrolytes ?

Answer 6

Free ions dissolved in water

Question 7

In the electrolysis what is the electrolyte ?

Answer 7

Copper sulfate solution

Question 8

What kind of ions does copper sulfate solution contain ?

Answer 8

Cu2+ ions

Question 9

What actually happens during electrolysis ?

Answer 9

1) electrons from copper atoms are pulled off at the anode. Causing them to go back into the solution as Cu2+ ions
2) electrons are offered at the cathode to nearby Cu2+ ions which turns them back into copper atoms
3) the impurities are dropped at the anode as sludge whilst pure copper atoms bond to the cathode

Question 10

The cathode is the ——– electrode ?

Answer 10

Negative

Question 11

Pure copper is what at the cathode ?

Answer 11

Deposited

Question 12

What is reduction ?

Answer 12

The gain of electrons or the removal of oxygen

Question 13

Where does reduction take place ?

Answer 13

At the cathode

Question 14

The positive electrode is called ?

Answer 14

The anode

Question 15

What happens to copper at the anode ?

Answer 15

It dissolves

Question 16

What is oxidation ?

Answer 16

The loss of electrons / the addition of oxygen

Question 17

Where does oxidation take place ?

Answer 17

Anode

Question 18

What gains mass during electrolysis ?

Answer 18

Cathode

Question 19

What loses mass during electrolysis ?

Answer 19

Anode

Question 20

What are the benefits of recycling copper rather than just mining for more ?

Answer 20

1) cheaper to recycle than it is to mind and extract

2) only using 15% of energy that would be used to mine the same amount

Question 21

What can an alloy be ?

Answer 21

A mixture of two or more different metals or a mixture of a metal and non metal

Question 22

Why would an alloy be more useful than the pure metal ?

Answer 22

They have properties that are different from the pure metal usually making them more useful

Question 23

What is steel an alloy of ?

Answer 23

Iron and Carbon

Question 24

Why would we rather have steel than just iron ?

Answer 24

It’s harder and stronger

Question 25

Why would we add carbon to the iron ?

Answer 25

Iron on its own will corrode quickly so adding a bit of carbon to make it into steel makes a big difference

Question 26

Name 3 things made from steel ?

Answer 26

Bridges
Cutlery
Washing machines

Question 27

Copper and zinc make what alloy ?

Answer 27

Bronze

Question 28

How would you describe the properties of brass ?

Answer 28

Just a mixture of copper and zinc but a lot harder

Question 29

What is brass used for ?

Answer 29

Musical instruments

Question 30

What is bronze an alloy of ?

Answer 30

Copper and Tin

Question 31

Properties of bronze are ?

Answer 31

Much harder
Much stronger
More resistant to corrosion

Question 32

What is solder an alloy of ?

Answer 32

Lead and tin

Question 33

Why is solder useful for soldering things ?

Answer 33

Because unlike pure metals it doesn’t have a definite melting point. It just gradually solidifies as it cools down

Question 34

What does the alloy amalgam contain ?

Answer 34

Mercury

Question 35

What’s a large scale use of amalgam ?

Answer 35

Filling teeth

Question 36

What is the name for the family of smart alloys ?

Answer 36

Nitinol

Question 37

When Jack sits on his glasses they go back to the original shape. How ?

Answer 37

Made of nitinol which has shape memory

Question 38

What’s nitinol made out of ?

Answer 38

Nickel & Titanium