Complete following: [5+5= 10 points]
In a strong acid (HNO3, 0.AB M) and strong base (NaOH, 0.AB M) titration, calculate the pH of final solution under following conditions:
A: 100 ml of acid + 60 ml of base = 160 ml
B: 100 ml of acid + 150 ml of base = 250 ml