When using primary and subsidiary reactions with acid-base equilibria...after you've found the concentrations using the primary reaction, do you use any subsidiary reaction to find the concentrations of say OH- or do you always use Kw=[H3O+][OH-]? D=

Question

thadyoung · Answer

What?

aaronq · Answer

you mean like when using a di- or triprotic acid?

anonymous · Answer

Mm, yeah ;o

aaronq · Answer

you would find the contribution of $H_3O^+$ or $OH^-$ from each dissociation (using the appropriate $K_A$) and add them up.