Question

In: Chemistry

A) Why does a buffer solution require a weak acid/base conjugate pair, as opposed to a...

A) Why does a buffer solution require a weak acid/base conjugate pair, as opposed to a strong acid, and its conjugate?

A strong acid will completely dissociate, suggesting that the conjugate base is really weak and will not neutralize any additional H+ ions.

A strong acid will completely dissociate, suggesting that the conjugate base is really strong and will not neutralize any additional H+ ions.

A strong acid will only partially dissociate, suggesting that the conjugate base is really weak and will not neutralize any additional H+ ions.

A strong acid will only partially dissociate, suggesting that the conjugate base is really strong and will not neutralize any additional H+ ions.

B) Write out reactions that show how a buffer of HCN/NaCN is able to control pH after the addition of HCl.

NaCN(aq) + HCN(aq)↔ HCl(aq) + NaCl(aq)

HCN(aq)+ HCl(aq)↔ NaCN(aq) + H2O(l)

NaCN(aq) + HCl(aq)↔ HCN(aq) + NaOH(aq)

NaCN(aq) + HCl(aq) ↔ HCN(aq) + NaCl(aq)

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