Answer to Question #110868 in Organic Chemistry for jason

Question

Arrange the compounds below in the order of increasing acidity and explain why you have arranged them in that order:
3-fluoropropanoic acid, iodoethanoic acid，Fluoroethanoic acid,

Answer 1

iodoethanoic acid, 3-fluoropropanoic acid, fluoroethanoic acid

fluoro is more electronegative compare to iodide this make fluoroethanoic and 3-fluoropropanoic acid more acid compare to iodoethanoic acid. The further the electron withdrawing group is from the functional group the less the effect and this is why fluoroethanoic acid is more acid compare to 3-fluoropropanoic acid.