CARBOXYLIC ACIDS CARBOXYLIC ACIDS

R C

O

OH

CH3OH[O]

K2Cr2O7

HCHO[O]

H2O2

HCOOH

C2H5OH[O]

K2Cr2O7

CH3CHO[O]

H2O2CH3COOH

CHCOOHHO

CHCOOHHO

CH2COOH

CCOOHHO

CH2COOH

HCOOH

CH3COOH

AromaticAromaticAliphaticAliphaticCOOH

COOH

OH

COOH

COOH

Formic acid

Acetic acid

Tartaric acid

Citric acid

Benzoic acid

Salicylic acid

Phthalic acid

Colourless

Colourless

Yellowish white

Liquid, mobily, true

Liquid, mobily, true

Solid, crystalline or powder

Pungent odor

Vinegar odor

Characteristic odor

Inflammable, non luminous, non smoky

Inflammable, non luminous, non smoky

Inflammable, luminous, smoky

Volatilization

Swelling up & blackening

Melting & blackening or charring

Melting

No change

Change in color flame

Change in appearance

Inflammability

Change in odor Residue

No change No residue

Burnt-sugar odorBlack residue

Yellow stain

No residueSuffocating odor

Phenolic odor

Na2CO3 solution + acid Effervescence

Miscible in H2O

Soluble in H2O

All the compounds are Strong acidAll the compounds are Strong acid

In soluble in H2O & dil. HcL but soluble in 10%

NaOH

Effervescence

Change blue L.p.

red

Not done (only for solid)

No reaction Burnt – sugar odor

No reaction

No reaction

Benzene odor

Phenolic odor

No reaction

No reaction

No reaction

No reaction

Burnt – sugar odor

Benzene odor

Phenolic odor

No reaction with all

Effervescence due to CO2 evolution Not done

No reaction

No reaction

Effervescence + heavy charring

Effervescence + yellow color

No reaction

Acid + NH4OH [until complete disapperance of ammonia odor]wait 2 3' cooling + 2-3 drops N. FeCl3

Blood red color – reddish brown color

Lemon yellow color

Buff ppt

No need to use NH4OH with acid JUSTJUSTAcid + H2O + N. FeCl3 Violet color