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C2
Fichas del conjunto (58)
- 1Cement and concrete What is thermal decompositionIt is the chemical breakdown a compound in to atlas two other compounds under the effect of heat
- 2Cement and concrete What does lime some/calcium carbonate need to decomposehigh temperature
- 3Cement and concrete What is the word equation for thermal decomposition of calcium carbonatecalcium carbonate-----calcium oxide+carbon dioxide
- 4Cement and concrete How is cement madeWhen limestone and clay are heated together
- 5What is a composite materialit is reinforced concrete which has steel rods or steel meshes running through it and is stronger than concrete
- 6Cement and concrete what s the symbol equation for calcium carbonateCaCO3---- CaO + CO2
- 7The raw material What is graniteIt is an igneous rock and is very hard
- 8The raw material How ar igneous rocks formedThey are formed out of liquid rocks that cools slowly and forms interlocking crystals as it solidifies.
It is the interlocking structure that gives it its hardness. - 9The raw material What is marbleit is a metamorphic rock
- 10The raw material How do metamorphic rocks formwhen a rock has been under heat and pressure in the earths crust making it harder than the original rock
- 11The raw material What is limestoneIt is a sedimentary rock, and is the softest
- 12The raw material How is sedimentary rock formedIt is made up of shells of dead sea creatures that have stuck together
- 13Rusting and corrosion What makes rusting happen fasterAcid rain and salt water
- 14Rusting and corrosion Why doesn't aluminium corrode in moist airIt does not corrode in moist air because it has a protective layer of aluminium oxide which doesn't flake of the surface
- 15Rusting and corrosion What is rustingIt is a chemical reaction between iron, oxygen and water called oxidation, this is because iron reacts with oxygen to make oxide
- 16Rusting and corrosion What is the chemical name for rustinghydrated iron oxide
- 17Rusting and corrosion What is the word equation for rustingiron+water+oxygen---hydrated iron oxide
- 18Recycling Why is is good for us to recycle metalsIt is good because it means less metal ore needs to be mined
- 19Recycling Why is it good to Recycle iron and aluminiumsaves money and energy compared to making them from their ores
- 20Recycling Why is it good to recycle plasticsmeans less crude oil being used and less biodegradable waste being dumped
- 21Recycling why is it good to recycle batteriesReduces the dumping of toxic materials in the environment
- 22Materials used in cars What are the advantages of using steel to make a carsIt is stronger and harder than aluminium which is important in the event of a crash
Car body is cheaper than a aluminium one - 23Materials used in cars What are the advantages of using aluminium to make a carIt will corrode less so has a longer lifetime
It has a better fuel economy - 24Metals and alloys How can inpure copper be purified using a laboratoryIt can be purified by using an electrolysis cell
The anode is the impure copper and dissolves in to the electrolyte
The cathode is played with new coppers - 25Metals and alloys What is electrolysisIt is the break up of a chemical compound when you break and electric current
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- 29Recycling copper What is copper used forit is used for recycling and has to be stored carefully so that valuable pure copper scrap isn't mixed up with less pure copper
- 30Alloys What doe most alloys containAmalgam contains mercury
Solder contains led and tin - 31Alloys What can smart alloys doThey can be bent more than steel so they are much harder to damage
They can change shape at different temperatures which is called shape memory - 32Alloys What is in brassIt contains copper and zinc
- 33Alloys What are the new ways of using smart alloysIn the frames of glass to top them from breaking
in shower heds to reduce the water supply if the temperature gets too hot - 34Alloys How can surgeons use smart alloysThey can put a small piece of metal into someones blocked artery and then warm it slightly. As it warms up it changes shape into a much larger tube that holds the artery open and reduces the chance of a heart attack
- 35Clean air What is clean air made up of78% nitrogen 21% oxygen carbon dioxide 0.035%
- 36Clean air Which process in the carbon cycle uses up carbon dioxidephotosynthesis
- 37Clean air Over the past few centuries the percentage of carbon dioxide has increased explain why?increased enerrgy use- more fossil fuels have been burnt in power stations
Increased population- The words energy requirement increased
Deforestation- as more trees are cut down less photosynthesis takes place - 38Pollution control You have to be able to describe the atmospheric pollutants name and describe the first oneCarbon monoxide- the origin of pollution- from incomplete combustion
- 39Pollution control You have to be able to describe the atmospheric pollutants name and describe the first second oneoxides of nitrogen- origin of pollutant- formed in the internal combustion of a engine
- 40Pollution control You have to be able to describe the atmospheric pollutants name and describe the first third oneSulphur dioxide- origin on pollutant- sulphur impurities in fossil fuels
- 41Pollution control What does a car catalyst doIt changes carbon monoxide into carbon dioxide
- 42Using fertilisers Who uses fertilisers and whyFarmers use them to boost there crop yield
- 43Using fertilisers What must fertilisers do before the can be absorbed by plant rootsThey must be dissolved in water
- 44Making fertilisers How can many fertilisers be madeMany fertilisers are salts so they can be made by reacting acids with bases
E.g acid+base------ salt+water - 45Making fertilisers Other fertilisersnitric +potassium hydroxide----- potassium + water
Hydro meand water
nitric means nitrate - 46the dangers of fertilisers What is eutrophicationIt occurs when fertilisers are washed off the land by rainwater into rivers and lakes. Resulting in the increase of nitrate or phosphate in the water encourages algae growth,
- 47The hater proccess what does the hater process neediron catalyst
high pressure
High temp 450 degrees
A recyling system for unreacted nitrogen and hydrogen - 48The haber process What is the word eqaution for the hater proccessnitrogen + hydrogen reversable ammonia
- 49The haber process what is symbol equation for the haber proccessN2+3H2 reversable 2NH3
- 50The haber process Can a fevrsable reaction have a percentage yield of 100%No because the reaction is reversible the percentage yield cant be a 100%
- 51The haber process What are the factors for increasing the percantage yieldhigh pressure but costs a lot
- 52The haber process What are the factors for decreasing the percentage yeildHigh temperature, however high temp makes the reaction go faster
- 53The haber process What do catalysts doThey make the reaction go faster
byt don't effect the yield - 54What are the key features of aliminium by electrolytic decompositionthe use of aluminium oxide
The anodes are gradually worn away by oxidation
the process require a high electrical input - 55What is the word equation for decomposition of aluminium oxidealiminium oxide-----aluminium+oxygen
- 56What are they features of electrolysis of dilute sulphuric acidTwo electrodes are connected to a DC soupy between 6 and 12 volts and placed into the electrolyte the electrode is connected to the negative terminal is the cathode
The electrode is connected to the positive terminal is the anode - 57What happens when the current is switched onBubbles of gas appear at both electrodes
Water splits un to two ions H+ is the positive ion OH- is the negative ion.
H+ is attracted o the negative cathode and is discharge as H2
OH- is attracted to the positive anode and discharged as O2 - 58Which two metal does nitithol smart alloy containnikitel and titanium
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- GCSE Science Fichas sobre C2, creado por Matthew Owen el 28/05/2016.
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- Matthew Owen
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