The addition of hydrochloric acid and ________ to water produces a buffer solution. A)HC₆H₅O B)NaOH C)NaCl D)C₂H₅NH₂ E)none of the above

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A buffer solution is typically made from a weak acid and its conjugate base or a weak base and its conjugate acid. Hydrochloric acid (a strong acid) and C₂H₅NH₂ (a weak base) can form a buffer solution when mixed in appropriate amounts.

The Addition of Hydrochloric Acid and ________ to Water Produces