I worked through a titration problem recently, and the weak base (F-) that resulted had a concentration of: [OH-] = 8.6 x 10-7
My question is, given that this number is very close to the concentration of hydroxide ion in pure water (1 x 10-7), would I have to add these two concentrations together to determine the [OH-]?
In the example, the concentration of OH- in water is ignored, but I feel like it should be included.
Finally, how would this effect (OH-)(H+)=1 x 10-14? Would I add the hydroxide concentration from both water and the weak base to find the concentration of the hydronium ion?