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A solution of weak acid HA was titrated ...

A solution of weak acid HA was titrated with base NaOH. The equivalent point was reached when 40 mL of 0.1 M NaOH has been added. Now 20 mL of 0.1 M HCl were added to titrated solution, the pH was found to be 5.0. What will be the pH of the solution obtained by mixing 20 mL of 0.2 M NaOH and 20 mL of 0.2M HA?

A

7

B

9

C

11

D

None of these

Text Solution

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The correct Answer is:
B
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