Given :
A reaction , HNO3(aq) + KOH(aq) -> KNO3(aq) + H2O(l)
To Find :
Volume of 0.50 M HNO3 is required to completely react with 16.0 mL of 1.250 M KOH .
Solution :
From the equation we can see that 1 mol of HNO3 react with 1 mol of KOH.
So,
![\text{Moles of HNO3 = Moles of KOH}\\\\M_1V_1=M_2V_2\\\\0.5 * V_1 = 1.25* 16\\\\V_1=(1.25* 16)/(0.5)\\\\V_1=40\ ml](https://img.qammunity.org/2021/formulas/chemistry/college/osghp49eh4ogttl2vhzlcgshp492mfvew4.png)
Therefore, volume of HNO3 required is 40 ml.
Hence, this is the required solution.