system
Given the following post, respond as if you're commenting on Reddit:
human
Why is hydrofluoric acid (HF) so corrosive if it is only a weak acid?

From what I understand, the H-F bond is very strong, meaning that there is a very low level of dissociation in solution, making it a weak acid.

What other factors are at play to make it so corrosive?
gpt
The "weak" and "strong" acid designation can be confusing - here, these words mean how much it dissociates (breaks apart into H^+ and the counterion) in solution. A "weak" acid such as HF remains more in the molecular form. This means that a certain concentration of a weak acid will not have as low a pH as a strong acid. 

What this terminology doesn't tell us about is the reactivity of the compound, or what it might do other than releasing H^+ into solution.