AP Chemistrymediummcq1 pt
A solution at 25 °C has pH = 2.50. What is its pOH?
A.9.50
B.11.50
C.2.50
D.16.50
Explanation
Core Concept
At 25 °C the scales are linked by pH + pOH = 14.00, which follows from Kw = 1.0 × 10⁻¹⁴. Substituting gives pOH = 14.00 - 2.50 = 11.50. The large pOH reflects a strongly acidic solution where hydroxide is scarce.
Correct Answer
B11.50
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