posted by Artem .
Describe the apparent relationship between H30 and OH concentrations when an endpoint is reached in acid-base titration.
H3O aproximately equal to OH concentration.
I suppose the answer here is that the (H3O^+) = (OH^-) and I think that answer is good BECAUSE you said "apparent" end point but ONLY because of that. For equivalence points that occur at pH = 7.0, the H^+ and OH^- are equal but at equivalence points not at 7.0 that is not true. The H^+ is larger than OH^- at methyl orange and methyl red end points and OH^- is larger than H^+ at phenolphthalein end points.
This is not useful at all
This Was Very Useful.