ATAR Notes: Forum

HSC Stuff => HSC Science Stuff => HSC Subjects + Help => HSC Chemistry => Topic started by: dux99.95 on March 30, 2017, 10:31:11 am

Title: Acids & Bases - ionisation VS dissociation?
Post by: dux99.95 on March 30, 2017, 10:31:11 am

Is this correct?

Bases - dissociate in water
Acids - ionise in solution

Thanks (:

Title: Re: Acids & Bases - ionisation VS dissociation?
Post by: jakesilove on March 30, 2017, 10:41:25 am

Quote from: saloni99.95 on March 30, 2017, 10:31:11 am

Is this correct?

Bases - dissociate in water
Acids - ionise in solution

Thanks (:

Sort of, by the Arrhenius definition of acids and bases. However, this is NOT the definition that we use in the HSC. In the HSC, we define Acids/Bases by the Bronsted-Lowry definition, which states that

Acids are proton (Hydrogen ion) donors
Bases are proton (Hydrogen ion) acceptors

Title: Re: Acids & Bases - ionisation VS dissociation?
Post by: Tino_BCP on July 08, 2017, 12:30:44 pm

So what is the difference between ionisation and dissociation??

Title: Re: Acids & Bases - ionisation VS dissociation?
Post by: Sine on July 08, 2017, 12:34:22 pm

Quote from: Tino_BCP on July 08, 2017, 12:30:44 pm

So what is the difference between ionisation and dissociation??

ionisation formation of ions so from covalent stuff e.g. HCl ionises into H+ and Cl-
Dissociation would be stuff like NaCl into it's constituent atoms Na+ and Cl- so it's for weak bonds e.g. ionic bonds

having not done HSC not sure how in detail you need to know this stuff so I hope this helps!! :)