weak points from past papers
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what reduces effectiveness of catalyst
poison
what is methane
natural gas
what is nucleon
protons + neutrons
property of platinum
good catalyst
what to mention in terms of collision theory
• frequency of collisons • activation energy • less/more ek
what is a saturated solution
solution containing maximum amount of solute dissolved at a given temp
why crystals form when the saturated solution cools down
solubility decreases as temperature decreases
what does coke do in blast furnace
• releases heat • reduces iron (III) oxide • reacts with CO2 to form carbon monoxide
coke burning
C + O2 -> CO2
reduction of carbon dioxide to carbon monoxide
CO2 + C -> 2CO
reduction of iron (III) by carbon monoxide
Fe2O3 ++ 3CO -> 2Fe + 3CO2
thermal decomposition of calcium carbonate to produce calcium oxide
CaCO3 -> CaO + CO2
formation of slag
CaO + SiO2 -> CaSiO3
overall equation of extraction of aluminium from aluminium oxide
2Al2O3 -> 4Al + 3O2
oxygen produced at anode during aluminium extraction equation
2O-2 -> O2 + 4e-
what is nitric acid
HNO3
what is the random of motion of particles called
brownian motion