What is the pH when (a) 49.0 mL and (b) 51.0 mL of 0.100 M NaOH solution have been added to 50.0 mL of 0.100 M HCl solution?
A) (a) 1.00; (b) 1.00
B) (a) 1.00; (b) 13.00
C) (a) 13.00; (b) 1.00
D) (a) 13.00; (b) 13.00