Why HCL is a strong acid(why furnishes more H+ ions) and why CH3COOH a weak acid?

Question

plzz give me intelligent answers..help

Answer 1

HCl is considered a stong acid as it readily donates protons, and is virtually 100% ionised in solution.  

On the other hand, ethanoic acid is considered a weak acid because it does not fully ionise in water (in fact, only approximately 1% of the CH3COOH molecules ionise).  The back reaction between ethanoate and hydronium ions actually occurs more readily than the forward reaction (between ethanoic acid and water).

Hope this helped!

Answer 2

It has to do with the bond strength of H to Cl and O. Cl being more electronegative than O has the bond more polarized towards Cl. In water, H leaves Cl and goes to H2O to form H3O+ and the acid is "strong". H's in water move around too but the NET result is H2O!

With acetic acid, 2 different O's (the ones on the acid and the water ones) are competing for the same H. The bond to the acid O is not as strong so there is a small amount of H+ in the water and the acid is "weak".

Answer 3

Because of their pH.