metal from ores

Question 1

are reactive metals found as ores or elements

Answer 1

ores- found joined together with other elements usually oxygen or sulphur

Question 2

examples of metals found as ores

Answer 2

tin,lead, iron, zinc

Question 3

are unreactive metals found as elements or ores

Answer 3

elements

Question 4

examples of metals found as elements

Answer 4

silver, gold

Question 5

in a metal ore the metal is present as an (atom/ion)

Answer 5

ion

Question 6

how does an ion become an atom

Answer 6

the metal must gain electrons (the metal ions must be reduced)

Question 7

what is the process of extracting metals from their ores

Answer 7

reduction

Question 8

what elements are extracted from ores by electrosis (page 10 data book)

Answer 8

zinc+aluminium ⬆️

Question 9

what metals can be extracted from their ore by heating with carbon or carbon dioxed (page 10 data book)

Answer 9

copper⬆️zinc

Question 10

what metals can be reduced from their ores with heat alone (page 10 data book)

Answer 10

silver ⬇️

Question 11

are more reactive metals easier or harder to extract from ores

Answer 11

more difficult

Question 12

carbon and carbon monoxide are used as a

Answer 12

reducing agent

Question 13

the reducing agent will always be a chemical which

Answer 13

reacts with the metal oxide

Question 14

what is electrosis

Answer 14

the proccess where elctricity is passed through an ionic compound which is molten or in an aqueous solution. the ionic compound is decomposed (broken down)

Question 15

in electrosis the ions have to be

Answer 15

free to move

Question 16

the positive ions are attracted to the

Answer 16

negative electrode

Question 17

in electrosis the ……. always gets reduced

Answer 17

metal

Question 18

why is d.c. currebt used in elctrosis

Answer 18

the current flows in one direction

Question 19

why is copper formed at the negative electrode

Answer 19

it is a metal so is postive

opposites attract

Question 20

defintion-electrolyte

Answer 20

a compound which conducts electricity due to movement of ions when in solution or molten

Question 21

how must electrolytes be bonded and why

Answer 21

must be ionic and soluble

Question 22

should electrolytes be reactive or unreactive

Answer 22

unreactive

Question 23

to produce a voltage the metals in an electrochemical cell must be

Answer 23

different

Question 24

elctrons always flow around the circuit from the metal ……. in the electrochemical series to the metal …… in the electrochemical series

Answer 24

higher to lower

Question 25

if the metals are further apart they create a

Answer 25

larger voltage

Question 26

at what electrode does oxidation happen in electrochemical cells

Answer 26

at the electrode which has the chemical highest in the series

Question 27

at what electrode does reduction happen

Answer 27

reduction always happens at the elctrode with the chemical lowest on the series

Question 28

what is a salt bridge and what does it do

Answer 28

It contains an ionic solution (electrolyte). It allows IONS to flow from one beaker to the other. It completes the electrical circuit. It must not react with the chemical in the beakers Insoluble substances and covalent