Fluroacetic acid is stronger acid than iodoacetic acid explain

Flourine atom shows better -I effect than Iodine atom .hence we can check the stability of carbanion after removing the acidic hydrogen from both the molecules

Due to small size of fluoride high electronic repulsion generated there and repel or release hydrogen easily.

We know that fluorine is more electronegative than chlorine. So, it will reduced the electron density on oxygen atom due to - I effect and hence removal of hydrogen ion from -OH is very easy which leads to higher acidic character.

We know fluorine has high -I effect than iodine.So fluoroacetic acid is stronger than iodoacetic acid. Thank☺☺☺☺

Acidity of a compound is measured by the ionisation energy as well as stability of conjugate base. Since in both the cases ionisation energy is same, so here the measuring factor is stability of conjugate base, in fluoroacetic acid the conjugate base is more stabilised due high inductive effect of fluorine compared to iodine, which is least electronegative of halogen series. This is why fluoacetic acid is more acidic than iodoacetic acid.