Alkanes
2 marks · EasyPentane () reacts with bromine in ultraviolet light.
Write a balanced chemical equation for the mono-substitution reaction between pentane and bromine.
Name the organic product formed.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) · must show correct reactants and products, one hydrogen replaced by bromine, balanced
(b) 1-bromopentane · must show name matches mono-substituted product
Must show: C5H12 + Br2 -> C5H11Br + HBr, 1-bromopentane
Also accept: C5H12 + Br2 → C5H11Br + HBr
Common mistakes: Giving 'chloropentane' or an incorrect formula
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correct balanced equation, e.g. .
B1 (b) · 1 mark · Correct name: 1-bromopentane (accept bromopentane or 2-bromopentane if structure is not given).
Worked solution
a)
b) The main organic product is 1-bromopentane.