VMINTEQ 3.1: How to add OH- species?

[Baho Ilok]

I'm using the free version of VMINTEQ 3.1 and I want to simulate titration with NaOH as the titrant, but I could not find OH- on the list. Can anyone teach me how? Thanks!

 

[Borek]

I haven't used MINTEQ in ages, but I don't think you can use just OH^-, it needs a counterion.

 

[Baho Ilok]

I haven't used MINTEQ in ages, but I don't think you can use just OH^-, it needs a counterion.

Ah I figured it out! Apparently OH- is represented by a negative value of the H+. But thanks for the reply!