• Best of luck to the class of 2024 for their HSC exams. You got this!
    Let us know your thoughts on the HSC exams here
  • YOU can help the next generation of students in the community!
    Share your trial papers and notes on our Notes & Resources page
MedVision ad

Amphoteric and Amphiprotic (1 Viewer)

Looking Glass

Member
Joined
May 3, 2007
Messages
86
Gender
Undisclosed
HSC
2007
Hey, thought I'd join in the discussion (confusion).

So, say they ask for an example of an amphiprotic substance using equations...
Would the following be what they're after?

HCO<sub>3</sub><sup>-</sup> + H<sub>2</sub>O --> CO<sub>3</sub><sup>2-</sup> + H<sub>3</sub>O

HCO<sub>3</sub><sup>-</sup> + H<sub>2</sub>O --> H<sub>2</sub>CO<sub>3 </sub>+ OH<sup>-</sup>

OR would it be more like this?

HCO<sub>3</sub><sup>-</sup> + OH<sup>-</sup> --> <sup></sup>CO<sub>3</sub><sup>2-</sup> + H<sub>2</sub>O

HCO<sub>3</sub><sup>-</sup> + H<sub>3</sub>O<sup>+</sup> --> H<sub>2</sub>CO<sub>3</sub><sup>- </sup>+ OH<sup>-</sup>

Or is the latter more like what they would want if the question had asked for an example of an amphoteric substance with equations?

Do you think we could simply use either in either case?
 
Last edited:

brenton1987

Member
Joined
Jun 9, 2004
Messages
249
Gender
Undisclosed
HSC
N/A
Looking Glass said:
HCO<SUB>3</SUB><SUP>-</SUP> + H<SUB>3</SUB>O<SUP>+</SUP> --> H<SUB>2</SUB>CO<SUB>3</SUB><SUP>- </SUP>+ OH<SUP>-</SUP>
HCO3- + H3O+ --> H2CO3 + H2O

---

Either of the 2 types of reaction would be fine as long as they show proton donation and proton acception.
 

jlnWind

Member
Joined
Sep 13, 2006
Messages
50
Gender
Male
HSC
2007
Looking Glass said:
Hey, thought I'd join in the discussion (confusion).

So, say they ask for an example of an amphiprotic substance using equations...
Would the following be what they're after?

HCO<sub>3</sub><sup>-</sup> + H<sub>2</sub>O --> CO<sub>3</sub><sup>2-</sup> + H<sub>3</sub>O

HCO<sub>3</sub><sup>-</sup> + H<sub>2</sub>O --> H<sub>2</sub>CO<sub>3 </sub>+ OH<sup>-</sup>

OR would it be more like this?

HCO<sub>3</sub><sup>-</sup> + OH<sup>-</sup> --> <sup></sup>CO<sub>3</sub><sup>2-</sup> + H<sub>2</sub>O

HCO<sub>3</sub><sup>-</sup> + H<sub>3</sub>O<sup>+</sup> --> H<sub>2</sub>CO<sub>3</sub><sup>- </sup>+ OH<sup>-</sup>

Or is the latter more like what they would want if the question had asked for an example of an amphoteric substance with equations?

Do you think we could simply use either in either case?
Umm i agree with brenton, any could be used
but please dont forget the bottom two are said to "go to completion"
whilst the above two are in equilibrium.
(according to conq chem)
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top