31. Solving a chemistry problem

1. What volume of 0.01 M sodium hydroxide per ml must be added to 100 ml of distilled water so that the concentration of hydrogen cations in the solution becomes ten thousand times less than the concentration of hydroxide anions? Note that in aqueous solutions at room temperature, the following relation holds:
[N] [OH-] \u003d 10-14
Square brackets denote ion concentrations in mol/l.