Answer : The volume of 0.10 M NaOH required to neutralize 30 ml of 0.10 M HCl is, 30 ml.
Solution :
According to the neutralization law,

where,
= molarity of NaOH solution = 0.10 M
= volume of NaOH solution = ?
= molarity of HCl solution = 0.10 M
= volume of HCl solution = 30 ml
Now put all the given values in the above law, we get the volume of NaOH solution.


Therefore, the volume of 0.10 M NaOH required to neutralize 30 ml of 0.10 M HCl is, 30 ml.