If one mole of Ba(OH)₂ is added to enough water to make 10 liters of solution,the pH of the resulting solution is ________. A)13.3 B)1.0 C)0.7 D)13.0 E)12.5

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Quizplus · Accepted Answer

Barium hydroxide, Ba(OH)2, is a strong base that dissociates completely in water to produce two moles of hydroxide ions (OH-) per mole of Ba(OH)2. The concentration of OH- ions in a 10-liter solution made from one mole of Ba(OH)2 is 0.2 M (since 1 mole in 10 liters gives a 0.1 M solution of Ba(OH)2, and each mole yields 2 moles of OH-, doubling the concentration to 0.2 M). Using the formula pOH = -log[OH-] and the relationship between pH and pOH (pH + pOH = 14 for water at 25°C), we can calculate the pH. The pOH is -log(0.2) ≈ 0.7, so the pH is 14 - 0.7 = 13.3.

If One Mole of Ba(OH)2 Is Added to Enough Water

If One Mole of Ba(OH)₂ Is Added to Enough Water