A basic buffer solution can be prepared by mixing:
Correct answer: B. Weak base and its salt with strong acid.
- A. Weak acid and its salt with strong base.
- B. Weak base and its salt with strong acid.
- C. Strong acid and its salt with weak base.
- D. Strong base and its salt with strong acid.
Explanation
By mixing a weak base and a salt of it with a strong acid. Such solutions will give basic bufers with pH more than 7. Mixture of NH4OH and NH4Cl is one of the best examples of such a basic buffer.
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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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