10 using resources

Question 1

what’s potable water

Answer 1

safe to drink but not pure
contains dissolved substances

Question 2

how’s potable water produced Uk

Answer 2

filtration - sterilisation
with chlorine

Question 3

hows sea water desalinated

Answer 3

distillation
reverse osmosis

Question 4

stages wastewater treatment

Answer 4

screening
sedimentation
aerobic digestion
sometimes anaerobic

Question 5

what’s a life cycle assessment

Answer 5

analysis of the environmental impact of a product from raw materials to disposal

Question 6

what’s corrosion

Answer 6

destruction of materials by chemical reactions

Question 7

how can rust be prevented

Answer 7

barrier methods (oiling , painting )
sacrificial protection (zinc)
galvanising

Question 8

what’s an alloy

Answer 8

mixture of metal with other elements

Question 9

test for pure water

Answer 9

boil water
boils at 100 C

Question 10

method to determine mass of dissolved solid a sample of river water

Answer 10

weigh container
measure 100cm of water into container
evaporate until dry
weigh container + remaining solids
determine mass of dissolved solids

Question 11

dm

Answer 11

to cm
x 10

Question 12

g

Answer 12

to mg
x 1000

Question 13

how are oxides of nitrogen are produced in a car engine

Answer 13

high temperatures in the engine
enable oxygen and nitrogen to react

Question 14

how does chromatography separate dyes in a food colouring

Answer 14

dyes distributed differently between stationary and mobile phase
so dyes move up the paper at different speeds/ rates

Question 15

how can you tell it has more than one dye

Answer 15

because chromatogram has different dots/colours
in a vertical column

Question 16

how to use chromatography to identify unknown dyes

Answer 16

run known dyes and food colouring
compare distances moved
can see those that move the same distance as known dyes

Question 17

how is copper metal produced from phytomining

Answer 17

1.growing plants in a low grade ore
2.plants burnt to produce ash
3.ash dissolved in acid produce solution of a copper compound
4.electrolysis of the solution
5. displacement by adding scrap iron to the solution

Question 18

calculate moles

Answer 18

mass/all the relative atomic masses

Question 19

why’s producing ethanol from CO2 sustainable

Answer 19

the amount of CO2 to produce the ethanol
is the same as the amount of CO2 given off when the ethanol is burned

Question 20

what’s sustainable development

Answer 20

meets the need of present
without compromising the future generation meeting their own needs

Question 21

what happens in reaction between mg and hcl

Answer 21

electron transfer

Question 22

test oxygen gas

Answer 22

glowing splint relights

Question 23

what happens when sulfur is removed

Answer 23

equilibrium shifts to right hand side
cuz conc of SO3 decreases

Question 24

how’s crude oil separated into fractions

Answer 24

heat or vaporise oil
temp gradient in column
vapour condenses into fractions
depending on boiling point of fraction

Question 25

why are diff products formed in two diff combustion

Answer 25

diff amount of oxygen available

Question 26

describe greenhouse effect with wavelengths

Answer 26

1.short wl radiation enters atmos 2.absorbed by materials remitted as longer wl radiation 3.longer wl is trapped by a greenhouse gas which stops radiation from escaping from atmosphere

Question 27

each fraction

Answer 27

condenses at a diff level

Question 28

name the alkane

Answer 28

propane

Question 29

general formula alkane

Answer 29

CnH2n+2

Question 30

what’s used to test for alkenes

Answer 30

bromine water

Question 31

why r lcas done

Answer 31

assess environmental impacts of the stages in the life of a product

Question 32

disposal of plastic bags

Answer 32

landfill burning

Question 33

one way carbon emissions can be reduced

Answer 33

use less plastic use recycled plastic

Question 34

how has the atmosphere changed from early times

Answer 34

nitrogen inc- volcanoes , bacteria, ammonia converted to it o2 inc- algae+plants photo CO2 dec- algae plants used it oceans formed it dissolved in water formed carbonates precipitate as sediments

Question 35

diff between potable and pure water

Answer 35

pure: no dissolved solids /impurities potable : dissolved solids

Question 36

how r ground water and sea water made potable

Answer 36

groundwater : filtered and sterilised seawater: distilled or reverse osmosis

Question 37

calculating mass

Answer 37

%/100 x the sample

Question 38

what’s formulation

Answer 38

mixture designed as a useful product

Question 39

calculate moles

Answer 39

mass/relative formula mass

Question 40

why does potassium chloride have a high melting point

Answer 40

giant lattice ionic strong bonds large amounts of e needed to overcome

Question 41

units for rate of reaction

Answer 41

Cm^3 per second

Question 42

how does size of marble chips affects rate of reaction

Answer 42

rate inc as chips get smaller

Question 43

how does size of marble chips affect rate of reaction

Answer 43

smaller chips have larger surface area for the same volume so more freq collisions

Question 44

test chlorine gas

Answer 44

damp/ moist litmus paper bleaches goes white

Question 45

why is equilibrium reached

Answer 45

forward and reverse reaction equal because no escape of reactants or products

Question 46

test chlorine gas

Answer 46

damp/ moist litmus paper bleaches goes white

Question 47

what happens to equilibrium

Answer 47

shifts to right hand side produce more of any products new equilibrium established

Question 48

increasing temp of reaction

Answer 48

amount of chlorine gas inc system shifts to counteract climate

Question 49

effect of increasing pressure on equilibrium

Answer 49

no change equal number of molecules