A 20.00-mL sample of 0.3000 M HBr is titrated with 0.15 M NaOH. What is the pH of the solution after 40.3 mL of NaOH have been added to the acid?

Question

Quizplus · Accepted Answer

After adding 40.3 mL of 0.15 M NaOH, the moles of NaOH added are equal to the moles of HBr initially present, resulting in a neutral solution. The pH of a neutral solution is 7. However, since NaOH is a strong base, the solution becomes slightly basic, leading to a pH greater than 7. The correct pH is 10.87.

A 2000-ML Sample of 0