Consider the following species and rank them from most acidic (1) to least acidic (7): NaCl, CH3CH2NH2, HCl, HCN, C5H5NHCl, NaOH, NaF?
回答 (1)
2018-07-09 11:21 am
(1) HCl (a strong acid)
(2) C₅H₅NHCl (C₅H₅NH⁺ ion is a weak acid with Ka ≈ 6 × 10⁻⁶)
(3) HCN (a very weak acid with Ka ≈ 6 × 10⁻¹⁰)
(4) NaCl (neutral)
(5) NaF (F⁻ is a very weak base with Kb ≈ 1 × 10⁻¹¹)
(6) CH₃CH₂NH₂ (a weak base with Kb ≈ 6 × 10⁻⁶)
(7) NaOH (a strong base)
(2) C₅H₅NHCl (C₅H₅NH⁺ ion is a weak acid with Ka ≈ 6 × 10⁻⁶)
(3) HCN (a very weak acid with Ka ≈ 6 × 10⁻¹⁰)
(4) NaCl (neutral)
(5) NaF (F⁻ is a very weak base with Kb ≈ 1 × 10⁻¹¹)
(6) CH₃CH₂NH₂ (a weak base with Kb ≈ 6 × 10⁻⁶)
(7) NaOH (a strong base)
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