A laboratory technician in Jamaica needs to distinguish between samples of ethanol and hexane. She adds each liquid separately to water in test tubes. What would she observe?

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Question

A laboratory technician in Jamaica needs to distinguish between samples of ethanol and hexane. She adds each liquid separately to water in test tubes. What would she observe?

Accepted Answer

Ethanol mixes with water while hexane forms a separate layer — Award 1 mark for recognizing that ethanol is miscible with water due to hydrogen bonding, while hexane is non-polar and immiscible. A is incorrect because hexane does not mix with water. B reverses the correct behavior. D is incorrect because ethanol does mix with water.

Answer

Both liquids mix completely with water forming clear solutions

Answer

Ethanol forms a separate layer while hexane mixes with water

Answer

Both liquids form separate layers with water

Answer

Ethanol mixes with water while hexane forms a separate layer

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