topic 4 extracting metals

Question 1

what happens in oxidation

Answer 1

the reaction with or the addition or oxygen

Question 2

what happens in reduction

Answer 2

the removal of oxygen

Question 3

what does a reactivity series show

Answer 3

how easily metals are oxidised

Question 4

are the least reactive in a reactivity series more or less resistant to oxidation

Answer 4

more resistant

Question 5

what is the reactivity like or something that when added to dilute hydrochloric acid fizzes vigorously

Answer 5

very reactive

Question 6

how do you show that hydrogen is formed

Answer 6

using a burning splint if it makes a squeaky pop

Question 7

what is the little thing i made up for the reactivity series

Answer 7

pink socks can make a cat zoom if he can see gold

Question 8

OILRIG?

Answer 8

oxidation is loss reduction is gain

Question 9

what is a displacement reaction

Answer 9

when a more reactive displaces a less reactive one

Question 10

how does carbon extract a metal from its ore

Answer 10

by reduction, the carbon removes the oxygen and forms CO2 and the metal

Question 11

what metals are extracted using electrolysis

Answer 11

potassium sodium calcium magnesium aluminium

Question 12

what metals are extracted by reduction using carbon

Answer 12

zinc iron tin copper silver

Question 13

what metals are found uncombined

Answer 13

gold and silver

Question 14

what is a con of using electrolysis to extract metals

Answer 14

expensive

Question 15

what is bioleaching

Answer 15

uses bacteria to separate metals from their ore, they get energy from the bonds between the atoms in the ore separating them in the process

Question 16

what is phytoextraction

Answer 16

growing plants in sol that contain the metal compounds, the metal builds up in the leaves, the plants are then harvested, dried and then burned in a furnace the ash has the metal compounds which ca be extracted using electrolysis

Question 17

what is good and bad about the new methods of extraction

Answer 17

smaller impact on the environment but are slower

Question 18

what are the stages of a life cycle assessment

Answer 18

choice of material, manufacture, product use, disposal

Question 19

what happens during the haber process

Answer 19

nitrogen and hydrogen react to form ammonia

Question 20

what is dynamic equilibrium

Answer 20

occurs when the forward and backward reaction in a reversible reaction occur at the same time and at the same rate, so there is no change in concentration of the reactants or the products

Question 21

what is Le Chatelier’s principle

Answer 21

if there’s a change in concentration, pressure or temperature

Question 22

what happens if you decrease and increase the temperature in a reversible reaction

Answer 22

decrease- equilibrium will move in the exothermic direction to produce more heat
increase- equilibrium will move in the endothermic direction to absorb the extra heat

Question 23

what happens if you change the pressure in a reversible reaction

Answer 23

increase- equilibrium will move to the side that has fewer moles of gas to reduce pressure
decrease- equilibrium will move towards the side that has more moles of gas to increase pressure

Question 24

what happens if you change the concentration in a reversible reaction

Answer 24

increase concentration of reactants - equilibrium will move to the right to use up the reactants (making more products)
increase concentration of the products- equilibrium will move to the left to use up the products (making more reactants)
decreasing will have the opposite effect