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Titration curves of 0.1 M solution of th...

Titration curves of `0.1 M` solution of three weak acids `HA_(1), HA_(2)` and `HA_(3)` with ionization constants `K_(1),K_(2)` and `K_(3)` respectively with a strong base are plotted as shown in the figure. Which of the following options is//are true?

A

`K_(2)=(K_(1)+K_(3))/(2)`

B

`pK_(1) lt pK_(3)`

C

`K_(1) gt K_(2)`

D

`K_(2) gt K_(3)`

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