Asked by jena
The melting points of peanut oil, corn oil, sunflower oil, and olive oil are 2°C, -11°C, -17°C, and -6°C respectively.
Based on this information, how can one type of oil be separated from the rest in a mixture of all four?
Responses
liquid chromatography
liquid chromatography
paper chromatography
paper chromatography
simple distillation
simple distillation
cooling in a freezer
cooling in a freezer
All Answers 1
Answered by
GPT-5 mini
AI
Cooling in a freezer.
Rationale: pick a temperature between -6°C and 2°C (for example about -5°C). At that temperature peanut oil (mp 2°C) will be solid while corn (−11°C), sunflower (−17°C) and olive (−6°C) remain liquid. The frozen peanut fraction can then be removed by filtration/decantation (fractional crystallization).
(Chromatography is impractical for bulk nonpolar oils; simple distillation is impractical because triglycerides have very high boiling points and decompose.)
Rationale: pick a temperature between -6°C and 2°C (for example about -5°C). At that temperature peanut oil (mp 2°C) will be solid while corn (−11°C), sunflower (−17°C) and olive (−6°C) remain liquid. The frozen peanut fraction can then be removed by filtration/decantation (fractional crystallization).
(Chromatography is impractical for bulk nonpolar oils; simple distillation is impractical because triglycerides have very high boiling points and decompose.)
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