1B Fats and oils /30 |
1) This question is about fatty acids and fats:
a) Draw and name the fatty acid 18:2(9.12) [2]
b) Use the shorthand notation for the following molecule [1]
c) Name the functional groups in the molecule in (b) [2]
d) Describe a simple chemical test you could carry out to distinguish between the molecules below [2]
e) Write a balanced chemical equation for the reaction between glycerol and hexadecanoic acid.
Circle the new functional group and label it [3]
2) This question is about fats and oils:
a) Draw the skeletal formulas for a i) saturated fatty acid ii) trans fatty acid iii) cis fatty acid [3]
b) Use your answers in (a) to explain the health issues associated with each (i) - (iii) [8]
c) Explain the difference between and fat and an oil [3]
d) Use your knowledge of the alkenes to describe how solids (margarine) are formed from oils [3]
3) Oils can be used to produce fuels.
a) Draw the structure of an oil made between glycerol and hexadecanoic acid: [1]
b) Write an equation for the formation of biodiesel from the triester in (a) [2]