Tests Flashcards
What are the reagents and conditions for aromatic amines?
Reagents: Tin (Sn) , HCl
Conditions: conc HCl
What does 2,4-dinitrophenylhydrozine identify?
Carbonyl groups:
- aldehydes
- ketones
What does K2Cr2O7 + dilute H2SO4 identify?
- primary/secondary alcohol
- aldehyde
What does Tollen’s reagent identify?
Aldehydes
What does bromine water identify?
Alkenes
Give the test for carboxylic acids?
Reagent: Magnesium Carbonate
Observation: Effervesces + gives off CO2
What type of reaction is a aromatic amines reaction?
Reduction reaction
Give the two observations when bromine reacts with phenol?
Decolourises
White precipitate
What does blue litmus solution identify?
Phenol
Carboxylic acids
What does aqueous silver nitrate identify?
Haloalkanes
Give the test for phenols + carboxylic acids?
Reagent: blue litmus solution
Observation: turns blue litmus red
Give the test for Haloalkanes?
Reagent: aqueous silver nitrate Observation: White precipitate (Cl) Cream precipitate (Br) Yellow precipitate (I)
What does magnesium carbonate identify?
Carboxylic acids
Ketones reduce to make what?
Secondary alcohols
Secondary alcohols oxidise to make what?
Ketones
Primary alcohols can be oxidised to make what?
1st - aldehyde
2nd - carboxylic acid
What is made when an aldehyde is reduced?
Primary alcohol
Give reducing agent
NaBH4
Give the test for Alkenes?
Bromine water
Orange -> colourless
What is created when an alcohol is heated under reflux with conc H2SO4?
Alkene
Give test for aldehyde?
Tollen’s reagent
Silver mirror
Give test for carbonyls?
2,4dinitrophenylhydrozine
Orange precipitate
Test for primary, secondary alcohols + aldehydes?
K2Cr2O7
H2SO4
Orange -> green
What is created when a primary alcohol is refluxed with K2Cr2O7?
Carboxylic acids
