Which set of solutes will form a buffer when dissolved in water to make 1 liter of solution?

Question

TestUstad · Accepted Answer

4 moles of NH₃ with 2 moles of HCl. NH₃ is a weak base, and partial neutralization with HCl produces NH₄⁺ (its conjugate acid). After reaction, both NH₃ and NH₄⁺ are present → a classic buffer pair. So only Option A forms a buffer.

TestUstad · Answer

0.0002 mole of HCl

TestUstad · Answer

2 moles of NaCl with 2 moles of HCl

TestUstad · Answer

4 moles of CH₃COOH with 4 moles of NaCl

Which set of solutes will form a buffer when dissolved in water to make 1 liter of solution?

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