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In relation to lipids, explain each of the following properties: Hydrogenation ________________________________________________________________ Plasticity _________________________________________________________________ - Leaving Cert Home Economics - Question 1 - 2019
Question 1
In relation to lipids, explain each of the following properties: Hydrogenation ________________________________________________________________ Plasticity ________... show full transcript
Worked Solution & Example Answer:In relation to lipids, explain each of the following properties: Hydrogenation ________________________________________________________________ Plasticity _________________________________________________________________ - Leaving Cert Home Economics - Question 1 - 2019
Step 1
Hydrogenation
Answer
Hydrogenation is a chemical process in which hydrogen is added to unsaturated fatty acids, typically in the presence of a nickel catalyst. This conversion transforms oils into saturated fats. For instance, this method is extensively used in the production of margarine. A clearly labelled diagram can illustrate the process, showing the addition of hydrogen to the unsaturated fats.
Step 2
Plasticity
Answer
Plasticity refers to the ability of a lipid to be either solid, liquid, or spreadable at room temperature. This property is determined by the degree of saturation of the fatty acids present in the lipid. Generally, the fewer unsaturated fatty acids present, the more solid the lipid becomes. For example, unsaturated margarines are spreadable and suitable for creaming due to their plastic nature.