AIM – To test the presence of carboxylic acid in the given organic compound.
Preliminary Test:-
| Experiment | Observation | Inference |
| Added bromine water to solution | No Effect | Compound is saturated |
| Or | Or | |
| Pink colour of Bromine water changed to colourless. | Compound is unsaturated. | |
| Added drop of blue Litmus to solution. | Solution turned Red. | Carboxylic Acid may be present. |
Confirmatory Test:-
| Experiment | Observation | Inference |
| Added sodium bicarbonate to solution. | Gas with brisk effervescence evolved. | Carboxylic acid confirmed. |
Chemical Equations:-
R3C-CR3 + Br2 –> No Effect
OR
R2C=CR2 + Br2 –> BrR2C-CR2Br
RCOOH + NaHCO3 –> RCOONa + H2O + CO2
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