Briefly, if I wanted to neutralize a solution of strong acid, I would use the appropriate amount of strong base. A weak base would incompletely neutralize the acid, not work slower or gentler. The problem with your current question is you have solutions expressed as %, and you need, according to the balanced equation you have, equal molar amounts. You have to convert your units to determine the right amounts to mix. Have you done this sort of conversion before? Its a pretty basic, early chemistry, sort of problem. But the time you've mastered it in class, usually you've mastered some basic laboratory safety procedures as well, so we can be sure you should be performing this sort of thing. So it works out well for us, liability-wise, as well.