Chemistry Topic 4 & 5

taylor2em
Flashcards by taylor2em, updated more than 1 year ago
taylor2em
Created by taylor2em about 8 years ago
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GCSE Chemistry Flashcards on Chemistry Topic 4 & 5, created by taylor2em on 05/21/2013.

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Question Answer
name all the outcomes of burning crude oil (starting at the hottest tempurature) and also name their use Bitumen- surfaces roads Fuel Oil- fuel for ships Diesel Oil-Lorries, trains and some cars Kerosene-fuel for aircrafts petrol- fuel for cars gases- heating and cooking
What are the characteristics of a short molecule chain? its more flammable and very viscous (sticky/gloopy)
What does complete combustion mean? using plenty of oxygen and burns to produce CO2 and Water (safe burning)
what does incomplete combustion mean? when there isn't enough oxygen, and hydrocarbons burn to produce CO2 + Water BUT also Carbon monoxide and Carbon
what are some effects of carbon monoxide? its a toxic (poisonous) gas
What do you need to consider when choosing the best fuel? how easily it burns, how well it can be transported and stored wether it produces alot of ash and smoke the ammount of heat energy is given out
how is acid rain formed? Sulphur Dioxide is given out in power stations, and it mixes with cloud forming a weak sulfuric acid, and then when it rains it falls as acid rain
what effects does acid rain have on the enviroment it falls into rivers and lakes and kill plants and animals living in the water it kills trees damages limestone buildings and ruins stone statues
What is a metal ore? a metal that has been extracted from rocks
Why is gold found uncombined? its unreactive
What does oxidation mean? metals gain oxygen to form oxides
When copper is oxidised what does it produce? copper oxide
What is the word that means oxygen is removed? reduction
What does the most common type of reduction reaction use? carbon
copper oxide + carbon GIVES?? copper + Carbon dioxide
what is the list called where metals can be shown how reactive they are? reactivity series
what extraction method is used for a metal higher than carbon? electrolysis
carbon is used to extract metals that are... below carbon
carbon is used to extract metals that are... below carbon
Why can iron ore be extracted from its ore using carbon? because it is below carbon in the reactivity series
What is the word equation for the reduction of iron? iron oxide + carbon = iron + carbon dioxide
what is the word used meaning breaking down using electricity? electroloysis
In electrolysis, what is the electricity applied by to the liquid? electrodes
how do you test for chlorine? Chlorine bleaches damp litmus paper, turning it white (don't forget to mention DAMP litmus paper!!)
What is a disadvantage of using electrolysis? its veeeeery expensive
name some properties of metals strong, can be bent/hammered into shape, good conductor of heat/electricity
name some everyday used of metals strong but bendy- ie bridges/car bodies good conductor of heat- saucepan base good conductor of electricity- electrical wires
what happens when metals corrode? they become weaker
which metals are more likely to corrode? metals that are higher up in the reactivity series (ones that a more reactive)
name some properties and used of aluminuim light and doesn't corrode- aircrafts, window frames,
Why does adding alloys make the metal stronger? Different sized atoms are placed randomnly and inbetween the other atoms, and this makes it more difficult for the layers to slide and roll over eachother
Why is recycling good? it uses less resources, because one day we will run out of metals we have in the earth. it uses less energy uses less money makes less rubbish
how is crude oil formed? its formed when remains of plants and animals are buried, and over millions of years they turn into crude oil and then it's pumped out of the ground
what is a hydrocarbon? just hydrogen and carbon atoms
how is crude oil split up? using fractional distillation
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