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Useful materials, including foods and fuels, are produced from plants - AQA - GCSE Chemistry - Question 6 - 2015 - Paper 1
Question 6
Useful materials, including foods and fuels, are produced from plants. 6 (a) Some plants have seeds that contain vegetable oils. 6 (a) (i) Give one reason why vege... show full transcript
Worked Solution & Example Answer:Useful materials, including foods and fuels, are produced from plants - AQA - GCSE Chemistry - Question 6 - 2015 - Paper 1
Step 1
Step 2
Step 3
One property of a vegetable oil gives the oil an advantage over water for cooking foods. Explain how.
Answer
Vegetable oils have a higher boiling point than water, which allows them to cook food at a higher temperature. This can enhance flavor and texture as food is cooked more effectively compared to using water.
Step 4
Explain how the emulsifier molecules are able to produce an emulsion that is a stable mixture containing the vegetable oil and water.
Answer
Emulsifier molecules have a hydrophilic ('water-loving') head that dissolves in water and a hydrophobic ('water-repelling') tail that dissolves in oil. When shaken, they help form a stable emulsion by allowing droplets of oil to suspend in the water, preventing them from separating. This stable mixture occurs because the different ends of the emulsifier molecules interact with both water and oil.