C2 flashcards continues

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what is bronze an alloy of?
copper and tin
1 of 30
what is solder an alloy of?
lead and tin
2 of 30
what makes alloys smart? give an example of a smart alloy
they have shape memory and go back to original shape after being bent and twisted. Nitinol is an example.
3 of 30
give the advantages of using aluminium to make car bodies instead of steel
less corrosive. lighter - better fuel economy.
4 of 30
disadvantages of using aluminium to make car bodies instead of steel
much more expensive. less strong and able to take impact
5 of 30
give the word equation for the oxidation of iron (rusting)
iron + oxygen + water --> hydrated iron oxide
6 of 30
what is universal indicator used for?
changes colour depending on pH of a substance
7 of 30
what is an acid?
a substance with a pH of less than 7
8 of 30
what is a base?
a substance with a pH of greater than 7
9 of 30
what is an alkali?
a base that is soluble in water
10 of 30
give the word equation of neutralisation (reaction between acids and bases)
acid + base --> salt + water
11 of 30
what are metal oxides and metal hydroxides? what happens if you react them with an acid?
bases. neutralisation
12 of 30
give the word equation of a reaction between an acid and carbonate
acid + carbonate --> salt + water + carbon dioxide
13 of 30
give the word equation for ammonium salts
acid + ammonia --> ammonium salt
14 of 30
give the four salts names formed from acids
chloride, sulfate, nitrate, phosphate
15 of 30
what do fertilisers do?
provide plants with essential elements for growth including nitrogen
16 of 30
give a name for something which produces fertilisers
ammonia, neutralise is with acids
17 of 30
give four examples of fertilisiers
ammonium nitrate, ammonium sulfate, smmonium phosphate, potassium nitrate
18 of 30
what is eutrophication? explain what happens as a result of it
level of nitrates and phosphates in lake water increases from run off from fertiliser on field. Algae multiplies from nutrients -> algae bloom, blocking off light and plants die, aerobic bacteria use oxygen when feeding on dead plants everything dies
19 of 30
how do you make artificial fertilisers?
titration method - choose right acid (nitric, sulfuric or phosphoric) and alkali (ammonia or potassium hydroxide) to get salt you want
20 of 30
what is the yield of a reaction?
the mass of product you end up with
21 of 30
what is the haber process? Is it reversible and what do you need for it to work?
taking nitrogen and hydrogen to make ammonia. It is reversible. For the reaction to work you need 200 atmospheres pressure and 450oC temperature and an IRON catalyst
22 of 30
what does a catalyst do?
speed up a reaction and keeps costs down and doesn't affect the % yield at the end
23 of 30
give the five factors for cost of production
price of energy, cost of raw materials, labour costs, plan costs, rate of production
24 of 30
what is needed for lowest production cost?
optimum conditions
25 of 30
give the two ways how salt can be mined
by being drilled, blasted and dug out and brought to the surface using machinary - extracted from underground deposits. Pumping hot water underground - solution mining
26 of 30
what does the electrolysis of brine give?
hydrogen, chlorine and sodium hydroide
27 of 30
what is oxidation?
the loss of elctrons
28 of 30
what is reduction?
the gain of electrons
29 of 30
what is the electrolysis of brine done by?
the chlor alkali industry
30 of 30

Other cards in this set

Card 2

Front

what is solder an alloy of?

Back

lead and tin

Card 3

Front

what makes alloys smart? give an example of a smart alloy

Back

Preview of the front of card 3

Card 4

Front

give the advantages of using aluminium to make car bodies instead of steel

Back

Preview of the front of card 4

Card 5

Front

disadvantages of using aluminium to make car bodies instead of steel

Back

Preview of the front of card 5
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