What is the pH of a solution prepared by diluting 50.00 mL of 0.020 M Ba(OH)₂ with enough water to produce a total volume of 250.00 mL? A)2.10 B)2.40 C)11.60 D)11.90

Question

Quizplus · Accepted Answer

Ba(OH)₂ is a strong base that dissociates completely in water to produce 2 OH⁻ ions per formula unit. The initial concentration of OH⁻ is 0.020 M * 2 = 0.040 M. After dilution, the concentration of OH⁻ becomes (0.040 M * 50.00 mL) / 250.00 mL = 0.008 M. The pOH is -log(0.008) = 2.10, and the pH is 14 - 2.10 = 11.90.

What Is the PH of a Solution Prepared by Diluting