When 25.0 mL of 0.400 M nitric acid and 25.0 mL of 0.200 M barium hydroxide are combined, the pH of the resulting solution will be : .....
A. Less than 7
B. Equal to 7
C. Greater than 7
Millimoles of HNO3 = 25×0.400 = 10
Millimoles of H+ = 10
Millimoles of barium hydroxide = 25×0.200 = 5
Millimoles of OH- ion = 2×5 = 10.
Thus both H+ and OH- neutralize each other and pH is 7
Hence, answer is B.
When 25.0 mL of 0.400 M nitric acid and 25.0 mL of 0.200 M barium hydroxide...