Why is ortho chloro benzoic acid more acidic than ortho fluoro benzoic acid?

+ M effect (Mesomeric effect) because of presence of lone pair of electrons which activates the ring and decreases acidity (increases pH). Fluorine is more electronegative than chlorine, so logically, fluorobenzoic acid should be a stronger acid than chlorobenzoic acid.

Why is ortho Bromo benzoic acid more acidic than propanoic acid?

The negative charge on O in (b) is stablized by the negative inductive effect of bromine,which is very small in magnitude as it is on para position. Otherwise,the compounds are similar. So,parabromobenzoic acid is a stronger acid(slightly so).

Which is strongest acid ortho iodo benzoic acid?

When any group is present at ortho to carboxyl group in substituted benzoic acid then the acidic character of that compound becomes at least more than benzoic acid. Generally ortho-substituted benzoic acids are stronger acids than their meta and para isomers also.

Which is more acidic para-chlorobenzoic acid or para Fluorobenzoic acid?

Fluorine is more electronegative than chlorine but p-fluorobenzoic acid is a weaker acid than p-chlorobenzoic acid.

Why phenyl acetic acid is stronger acid than acetic acid?

Here in acetic acid if we draw resonating structure then same negative charge resides on oxygen atom but if we draw the resonating structure of phenol the negative charge move on from oxygen to carbon and it becomes a non equivalent structure. Hence acetic acid is more acidic than phenol.

Why ethanoic acid is a weaker acid than benzoic acid?

The ethanoic acid (pKa = 4.76) is weaker acid than benzoic acid (pKa = 4.19 ). Due to the presence of benzene ring in benzoic acid, delocalisation of electron makes it more acidic than ethanoic acid but such stabilization is not present in ethanoic acid.

Why P Fluorobenzoic acid is weaker than P chlorobenzoic acid?

Fluorine is more electronegative than chlorine even then p-fluorobenzoic acid is a weaker acid than p-chlorobenzoic acid. Explain. -effect which outweighs the +R-effect. Consequently, p-fluorobenzoic acid is a weaker acid than p-chlorobenzoic acid.

Why Fluorobenzoic acid is weaker than chlorobenzoic acid?

Fluorine is more electronegative than chlorine but p-fluorobenzoic acid is a weaker acid than p-chlorobenzoic acid. Both fluorine and chlorine are involved in -I effect as well as +M effect (due to presence of lone electron paris) with the benzene ring.

Why is p-fluorobenzoic acid weaker than P-chlorobenzoic acid?