ATAR Notes: Forum

HSC Stuff => HSC Science Stuff => HSC Subjects + Help => HSC Chemistry => Topic started by: Einstein_Reborn_97 on February 10, 2020, 08:14:28 pm

Title: Bronsted-Lowry Theory
Post by: Einstein_Reborn_97 on February 10, 2020, 08:14:28 pm

One of the revision questions (help would be appreciated):
H₂O(l) + HCl(g) ⇌ H₃O⁺(aq) + Cl^-(aq)
Explain why HCl is shown in the gas state rather than aqueous.

Title: Re: Bronsted-Lowry Theory
Post by: kiwibirdau on February 18, 2020, 08:28:35 am

Hydrogen monochloride is not an acid in gaseous state, only when added to water does it ionise and form the characteristic H3O+.
(Hydronium ion) and is thus known as hydrochloric acid.

This supports the Bronsted Lowry theory for acids and bases, when HCl(g) is added to water, water accepts H+ to form H3O+, as a proton acceptor - water acts as a base and as HCl(g) donates the H+ it is an acid.

Title: Re: Bronsted-Lowry Theory
Post by: Einstein_Reborn_97 on February 19, 2020, 11:55:35 pm

Thanks so much!