How to tell if an acid disassociate completely or partially? [closed]








**Closed.** This question is [off-topic](/help/closed-questions). It is not currently accepting answers.
 
 






---








 **Homework questions** must demonstrate some effort to understand the underlying concepts. For help asking a good homework question, see: [How do I ask homework questions on Chemistry Stack Exchange?](https://chemistry.meta.stackexchange.com/questions/141/how-do-i-ask-homework-questions-on-chemistry-stack-exchange)




Closed 3 years ago.








[Improve this question](/posts/127287/edit) 



what is the difference between 


[![enter image description here](https://i.stack.imgur.com/6LXUa.png)](https://i.stack.imgur.com/6LXUa.png) and 


[![enter image description here](https://i.stack.imgur.com/jRKRk.png)](https://i.stack.imgur.com/jRKRk.png)


how can I tell which one is the stronger acid, base on the 2 equations?




The equations don't tell you the complete story, just as by looking at an equation one cannot predict the boiling point of HCl, in the same way we cannot say how many HCl or acetic acid molecules are dissociating in water. In easy words, if you had 0.1 moles of HCl in 1 L of water, all of them will dissociate in water, however if you have acetic acid, then only 1.3% acetic acid molecules will dissociate and the rest will remain in molecular form. It is a dynamic process. To see how this is calculated see
<https://www.chemteam.info/AcidBase/Calc-percent-dissoc-of-weak-acid.html>


We should use double arrows when we show the dissociation of acetic acid.


 1