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AQA A-level Bio + Chem + P.E. > Organic analysis > Flashcards

Organic analysis Flashcards

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1
Q

How do you test for alkenes?

A

Add bromine water and shake
Result = bromine decolourises (orange —> colourless)

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2
Q

How do you test for haloalkanes?

A

Add NaOH and warm
Acidify with HNO3
Add AgNO3
Results:
AgCl = white ppt
AgBr = cream
AgI = yellow

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3
Q

How do you test for alcohols?

A

Add acidified potassium dichromate
Result = orange —> green (primary + secondary, NOT TERTIARY)

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4
Q

How do you test for aldehydes (2 ways)?

A
  1. Warm with Fehling’s solution
    Result = brick red ppt
  2. Warm with Tollen’s reagent
    Result = silver mirror
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5
Q

How do you test for carboxylic acids?

A

Add sodium carbonate (Na2CO3)
Result = effervescence / CO2 given off

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6
Q

What is the fingerprint region on an infrared spectra?

A

Area below 1500cm-1

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AQA A-level Bio + Chem + P.E. (95 decks)

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