How can you make a balanced equation from this chemical reaction?

We mixed 0.5 M NaOH (50 mL) which is a base, and an unknown molarity of the acid H2SO4 (10 mL). This was an acid and base titration lab, so water and phenolphthalein was used as well, but it's not included in the equation. How can I figure out the molarity of the acid, and how can I create a balanced equation from this?