The graph below is a titration curve of three different solutions. Solution I is

Question

The graph below is a titration curve of three different solutions. Solution I is titrated with a base of a lower pH. Rank the solutions in terms of the strength of the acid in the solution.

Apparantly, the correct answer is "there is no difference among the strength of the acids," however I'm not entirely sure why. The explanation states that graph II has a higher concentration of acid than graph III, but why would this shift the titration curve to the right? Shouldn't the curve just become less compressed at higher concentrations as shown in the figure below?

Or maybe this has something to do with differences in the identity of the analyte between solutions II and III? Also, I don't understand why a titrant of lower pH (Solution I) would decrease the equivalence point. Wouldn't you then need more titrant to neutralize the analyte? Can someone please thoroughly explain? Thank you!

Explanation / Answer

where are the graphs?

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