Which of the following is a buffer system? Which of the following is a buffer system? H2CO3 (aq) and KHCO3 (aq) NaCl (aq) and NaOH (aq) H2O (l) and HCl (aq) HCl (aq) and NaOH (aq) NaCl (aq) and NaNO3 (aq)

Question

Chemistry

Denzel Ortega

3 March, 04:13

Which of the following is a buffer system? Which of the following is a buffer system? H2CO3 (aq) and KHCO3 (aq) NaCl (aq) and NaOH (aq) H2O (l) and HCl (aq) HCl (aq) and NaOH (aq) NaCl (aq) and NaNO3 (aq)

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David Jenkins · Answer 1

A buffer is defined as an aqueous mixture of a weak acid and its conjugate base or vice versa.

In the systems:

H₂CO₃ (aq) and KHCO₃ (aq) : Carbonic acid, H₂CO₃, is a weak acid that, in solution with its conjugate pair, HCO₃⁻ make a buffer system.

NaCl (aq) and NaOH (aq) : NaCl is a salt and NaOH is a strong base. Thus, this system is not a buffer system.

H₂O (l) and HCl (aq) : Water is a solvent and HCl a strong acid. This is not a buffer system.

HCl (aq) and NaOH (aq) : HCl is a strong acid and NaOH a strong base. This is not a buffer system.

NaCl (aq) and NaNO₃ (aq) : Both NaCl and NaNO₃ are salts and this system is not a buffer system.