Chemistry · Oct / Nov 2021 · Paper 41 · Question 5
0620
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Alkenes and carboxylic acids are both families of similar compounds with similar chemical properties. Alkenes and carboxylic acids have different reactions.
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5(a)[1]
homologous series
5(b)[1]
CnH2n
5(c)(i)[1]
orange to colourless
5(c)(ii)[1]
(only) one product is formed
5(c)(iii)[2]
C4H8 + Br2 → C4H8Br2
C4H8Br2 (1)
equation fully correct (1)
5(c)(iv)[1]
(poly) but-2-ene
5(c)(v)[2]
but-1-ene (1)
structure of but-1-ene
(1)
5(d)(i)[1]
C2H4O
5(d)(ii)[2]
2C3H7COOH + Na2CO3 → 2C3H7COONa + H2O + CO2
C3H7COONa (1)
equation fully correct (1)
5(d)(iii)[3]
methyl butanoate (1)
ester link (1)
rest of structure (1)
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