Of the Bases NaOH, H₂O, CN^-, SO₄^2-, and HPO₄^2-, Which

question 75

Multiple Choice

Of the bases NaOH, H₂O, CN^-, SO₄^2-, and HPO₄^2-, which is the weakest? (K_a for HCN is 6.2 × 10^-10; K_a for HSO₄^- is 1.2 × 10^-2; and K_a3 for H₃PO₄, is 4.8 × 10^-13)

• A) CN^-
• B) HPO₄^2-
• C) SO₄^2-
• D) NaOH
• E) H₂O

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