## Question

A 100mL solution of 0.1 N HCl was titrated with 0.2 N NaOH solution. The titration was discontinued after adding 30mL of NaOH solution. The remaining titration was completed by adding 0.25 N KOH solution. The volume of KOH required for completing the titration is

### Solution

16mL

N_{1}V_{1} = N_{2}V_{2} + N_{3}V_{3}

*i.e.*

or 0.25 V_{3 }= 4 or V_{3} = 16mL

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