How would I identify and find the molarity of the unknown solutions?

For my next lab we will be given a 100mL identified sample of .5M NaOH. We will also be given 10mL unidentified samples of Ba(NO3)2, H2SO4, HNO3, and Phenolphthalein. Barium Nitrate has a molarity of 0.1M. How would I identify each unknown solution and the molarity of both acids. Ideas that come to mind include basic titration, possible precipitates. We can not use any thing else or more of what is given.