What is the pH of a solution prepared by diluting 25.00 mL of 0.020 M Ba(OH)₂ with enough water to produce a total volume of 250.00 mL? A)2.40 B)2.70 C)11.30 D)11.60

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Quizplus · Accepted Answer

Ba(OH)₂ is a strong base and 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 * 25.00 mL) / 250.00 mL = 0.004 M. The pOH is -log(0.004) = 2.40. Therefore, the pH is 14 - 2.40 = 11.60.

What Is the PH of a Solution Prepared by Diluting