Question

Which is a better acid prpanoic acid or ethanoic acid?

Answer 1

I got the answer from KaKa value that acetic acid is more acidic, but I have also read that inductive effect decreases as the length of alkyl group increases so acetic acid having a methyl group should have greater +I effect than ethyl group in propanoic acid.

And this comparitive large +I effect of methyl group in acetic acid should make it less acidic (as polarity of O−HO−H bond decreases) than propanoic acid with ethyl group with less +I effect.