[Shahab Mirza]

There are two compounds ChloroAcetic Acid and Formic Acid , the ChloroAcetic Acid dissociates more readily than other, why? what is the reason , after all both are acids , then why help ? thanks

[Ben Bob2]

This problem is similar to the one posted by Adidx a few days ago here: http://www.chemicalforums.com/index.php?PHPSESSID=0acfb9afaf038839bb9a21cffef39f52&topic=76810.0

Read through the replies and hopefully it will make sense to you

As you do so, what is the obvious difference in the two acids in your question?
How do you think that difference effects the readiness of the hydrogen to dissociate?

[Shahab Mirza]

This problem is similar to the one posted by Adidx a few days ago here: http://www.chemicalforums.com/index.php?PHPSESSID=0acfb9afaf038839bb9a21cffef39f52&topic=76810.0

Read through the replies and hopefully it will make sense to you

As you do so, what is the obvious difference in the two acids in your question?
How do you think that difference effects the readiness of the hydrogen to dissociate?

hmm , so after figuring  out for hours i got something weird, see bro Chloroacetic acid is stronger, because it contains (more electronegative) chlorine atoms in the place of (less electronegative) hydrogen

is my reason valid , correct me if i m wrong :/

[Ben Bob2]

Yup, you are correct
The difference comes from the inductive affect.
Here's a great video about it:
https://www.khanacademy.org/science/organic-chemistry/organic-structures/acid-base-review/v/stabilization-of-conjugate-base-iii

[Shahab Mirza]

wow, chemistry is giving me hard time :/ btw its enjoyable, thanks