Which of the following aqueous solutions will be basic?
Correct answer: B. Na₂CO₃
- A. NaCl
- B. Na₂CO₃
- C. Na₂SO₄
- D. FeCl₃
Explanation
Sodium carbonate (Na₂CO₃) is the salt of a weak acid (H₂CO₃) and a strong base (NaOH). The carbonate ion (CO₃²⁻) hydrolyzes water to produce OH⁻ ions, making the solution basic.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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