Olive oil is a mixture of triglycerides. Small amounts of…
Question Answered step-by-step Olive oil is a mixture of triglycerides. Small amounts of… Olive oil is a mixture of triglycerides. Small amounts of carboxylic acids, which affect the quality ofthe oil, are also present.(a) Olive oil deteriorates when oxygen in the air reacts with unsaturated carboxylic acids in theoil. Each double bond breaks and smaller compounds are formed. The structural formula ofone of these compounds is shown below:CH,(CH,), CHOState the systematic name of this compound.(2 marks)(b) The grade of olive oil is defined by the amount of oleic acid (C₁7H33COOH) present. Theamount of oleic acid in a sample was determined by titration with a potassium hydroxideHexanalsolution.(i) State the reacting mole ratio of potassium hydroxide and oleic acid.(1 mark)(ii) Calculate the mass of potassium hydroxide required to prepare 250 mL of solution with a concentration of 0.10 mol L-¹.(3 marks)(iii) The olive oil sample was prepared for titration by adding propan-2-ol.Explain why propan-2-ol, rather than water, was added to the olive oil.Water is a very polar molecule hence unable to form strong interaction with the low polarity olive oil molecule. Whereas propan-2-ol has a non-polar molecule, making oilve oil more soluble in propan-2-ol.hydrocarbon section which able to form dispersion forces with the oilve oil(2 marks)2(iv) The potassium hydroxide solution was checked and found to have a concentration of 0.108 mol L-¹. A titre of 6.45 mL of this potassium hydroxide solution was required to neutralise the oleic acid in the olive oil sample.(1) Calculate the mass of oleic acid in the olive oil sample, given that 1 mol has a mass of 282.46 g. Image transcription text(iv) The potassium hydroxide solution was checked and found to have a concentration of 0.108mol L-‘. A titre of6.45mL of this potassium hydroxide solution was required to neutralise the oleic acid in the olive oil sample. (1)Calculate the mass of oleic acid in the olive oil sample, given that 1 mol has a mass of 282.46 9. (3… Show more… Show more Science Chemistry CHEM 9701 Share QuestionEmailCopy link Comments (0)
