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Reviewed CSCA Chemistry question · Easy

下列氧化物中,既能与酸反应生成盐和水,又能与碱反应生成盐和水的是?

  1. CO2
  2. Na2O
  3. Al2O3
  4. SO2
Show the answer and explanation

Correct answer

C. Al2O3

Principle or equation

两性氧化物既能与酸反应生成盐和水,又能与碱反应生成盐和水。Al2O3是典型的两性氧化物。

Why this answer is correct

Al2O3与盐酸反应生成氯化铝和水:Al2O3 + 6HCl = 2AlCl3 + 3H2O;与氢氧化钠反应生成偏铝酸钠和水:Al2O3 + 2NaOH = 2NaAlO2 + H2O。CO2和SO2是酸性氧化物,只能与碱反应;Na2O是碱性氧化物,只能与酸反应。

Example

例如,Al2O3 + 2NaOH = 2NaAlO2 + H2O,体现了其与碱反应的性质。

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