Investigating the chemistry of the OH group
Conclusions
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To test for a carboxylic acid, mix with a carbonate and look for effervescence. CO2(g) emitted, can test with limewater.
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To test for phenol group, mix with neutral FeCl3 solution and look for pale yellow colour turning purple.
Useful books for revision
Revise A2 Chemistry for Salters (OCR A Level Chemistry B)
Salters (OCR) Revise A2 Chemistry
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