Chemistry · Oct / Nov 2024 · Paper 42 · Question 3
0620
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Sulfur forms two chlorides, P and Q. Chloride P has the formula S2C! 2. Chloride Q has the formula SC! 2.
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3(a)[2]
M1 attraction between molecules
M2 attraction is weak
3(b)[1]
2S + Cl2 → S2Cl2
3(c)[3]
M1 S with one dot-cross bonding pair with each Cl
M2 four non-bonding dots for S
M3 six non-bonding crosses for each Cl
3(d)[2]
M1 decrease concentration of S2Cl2 / P and / or Cl2
M2 increase temperature
3(e)(i)[1]
the minimum energy that colliding particles must have to react
3(e)(ii)[1]
Ea
3(e)(iii)[5]
M1 increases M2 no change
M3 increases M4 increases
M5 increases
3(f)[4]
M1 oxidation number of S goes from +1
M2 oxidation number of S goes to +2
M3 oxidation number of Cl (goes from –1) to 0 (in Cl2)
M4 oxidation numbers of Cl AND S increase
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