Question

Explain why the titration of the strong acid titration starts at a much lower pH than the weak acid titration, but that the ending pH of the titration where an excess of NaOH has been added (~pH 12) is roughly the same for both titrations.

If possible, please include a picture or diagram to explain your answer.

Answer 1

as we know strong acids which dissociates completely.

if we take same concentration of strong acid and weak acid weak acids dissociates dissociates partially while strong acids dissociates completely.

as more the number hydrogen ions lesser the pH.

thats why for strong acids curve starts with lesser ph compared to weak acids.

after end point when exess NaOH (strong base) added weather it is strong acid or weak acid only OH ions present in the so;ution it caused higher pH in both the cases strong aswell as weak acids.