This question is about isomers:
Give a reagent and observations for a test-tube reaction to distinguish between 2-methylbutan-1-ol and 2-methylbutan-2-ol - AQA - A-Level Chemistry - Question 6 - 2019 - Paper 2
Question 6
This question is about isomers:
Give a reagent and observations for a test-tube reaction to distinguish between 2-methylbutan-1-ol and 2-methylbutan-2-ol.
Reagent:... show full transcript
Worked Solution & Example Answer:This question is about isomers:
Give a reagent and observations for a test-tube reaction to distinguish between 2-methylbutan-1-ol and 2-methylbutan-2-ol - AQA - A-Level Chemistry - Question 6 - 2019 - Paper 2
Step 1
Reagent:
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Answer
The reagent to use is potassium dichromate (K2Cr2O7) in dilute sulfuric acid (H2SO4).
Step 2
Observation with 2-methylbutan-1-ol:
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Answer
When 2-methylbutan-1-ol is added to the potassium dichromate solution, the solution goes from orange to green, indicating the presence of an alcohol that is oxidized.
Step 3
Observation with 2-methylbutan-2-ol:
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Answer
When 2-methylbutan-2-ol is added to the potassium dichromate solution, there is no color change; the solution remains orange, indicating that this alcohol is not oxidized.
