A-Level ChemistryYear 2019Q15
12201 15 The ester tripalmitin can be used to make biodiesel using transesterification. Tripalmitin is formed when glycerol reacts with palmitic acid. CH2OCOC15H31 CHOCOC15H31 CH2OCOC15H31 tripalmitin (a) Write an equation for the formation of tripalmitin from glycerol and palmitic acid. [2] (b) Use the structure of tripalmitin to explain whether tripalmitin is a saturated or unsaturated fat. [2] (c) Explain the term transesterification. [2] 12201 [Turn over (d) Write the equation for the reaction between tripalmitin and methanol forming molecules, some of which are used in biodiesel. [1] (e) From the equation written in (d), write the formula of the product that could be used as biodiesel. [1]
Paper Source:GCE-Chemistry-467-Summer2019-A2 1%2C Further Physical and Organic Chemistry-Paper.pdf
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Exam Specification Info
This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectChemistry
Official MarksVariable (2–6 marks)