Amphoteric and Amphiprotic (1 Viewer)

[Looking Glass]

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?

HCO₃^- + H₂O --> CO₃^2- + H₃O

HCO₃^- + H₂O --> H₂CO₃+ OH^-

OR would it be more like this?

HCO₃^- + OH^- --> CO₃^2- + H₂O

HCO₃^- + H₃O⁺ --> H₂CO₃^-+ OH^-

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?

 

[brenton1987]

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]

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?

HCO₃^- + H₂O --> CO₃^2- + H₃O

HCO₃^- + H₂O --> H₂CO₃+ OH^-

OR would it be more like this?

HCO₃^- + OH^- --> CO₃^2- + H₂O

HCO₃^- + H₃O⁺ --> H₂CO₃^-+ OH^-

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)