The titration would require the same amount of NaOH.
The number of moles of solute in a solution remains the same irrespective of the amount of water added to dilute the solution.
This is in accordance with the dilution law which says that the number of moles of a solution before dilution is the same as after dilution.
Thus, the amount of NaOH needed to neutralize the vinegar will remain the same for a complete reaction since the number of moles of solute in the vinegar has not changed.
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