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100 mL of 0.1 M Na2 CO 3 solution ...

100 mL of 0.1 M ` Na_2 CO _ 3` solution is titrated with `0.1 M ` HCl solution. If reaction taking placing during titrationis
` Na _ 2 CO _ 3 + HCl to Na HCO _ 3 + NaCl`
then find pH at half equivalent point. for `H_2 CO _ 3 , Ka_ 1 = 10 ^(-7)` and `Ka _ 2 = 10 ^( -11)`.

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