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第三題怎麼算ㄒ⋯⋯ㄒ

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3. Calculate the pH of 0.10 M NH4CN. (Kb for NH3 = 1.8 x 105; K₂ for HCN = 6.2 × 10-¹0)
(A) 5.79 (B) 8.21 (C) 8.87 (D) 5.13 (E) 9.23
4. Compounds X and Y have the same mass, but compound Y has two more atoms in its
structure. Which statements must be true?
(A) C, for compound X is greater than C, for Y (B) C, for compound X is less than C, for Y (C) Cp for

Answer 1

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