An acidic buffer solution can be prepared by mixing:
Correct answer: D. NaF + HF.
- A. NaF + NaOH.
- B. HCI + NaCI.
- C. NH4F + NH4OH.
- D. NaF + HF.
Explanation
Weak acid and salt with strong base.Sodium fluoride (NaF) is a salt, and hydrofluoric acid (HF) is a weak acid. Mixing a salt with a weak acid does not create an acidic buffer solution.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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