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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 property is beneficial for frying and sautéing, as it enhances flavor and texture.
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 possess both a hydrophilic (water-attracting) head and a hydrophobic (water-repelling) tail. When mixed with vegetable oil and water, the hydrophilic heads attach to water while the hydrophobic tails cling to the oil. This creates a stable suspension of tiny oil droplets dispersed in water, preventing them from separating. The interaction of these two parts allows the emulsifier to stabilize the mixture, making it homogenous.