Chemistry · May / June 2020 · Paper 41 · Question 3
0620
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Sulfur dioxide, SO2, is used in the manufacture of sulfuric acid.i
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3(a)[1]
zinc blende
3(b)(i)[2]
reaction is reversible
rate of forward reaction = rate of reverse reaction
3(b)(ii)[1]
vanadium(V) oxide
3(b)(iii)[1]
increases the rate of reaction
3(b)(iv)[3]
particles have more energy (E)
rate of collisions increase
a higher proportion of particles have energy greater than activation energy (E > EA)
3(b)(v)[1]
exothermic
3(b)(vi)[2]
Mr of SO3 = 80
32
100
40%80
3(c)[2]
anhydrous copper(II) sulfate
carbon
3(d)(i)[1]
not all (C–C) bonds are single
3(d)(ii)[2]
C3H7OH → C3H6 + H2O
M1 C3H6
M2 rest of the equation
3(d)(iii)[1]
propene
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