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5. Suppose you add 2.0 mL of 0.10 M HCl to 100 ml of buffer having 0.10 M HA and 0.20 M NaA. The pKa of the acid HA is 4.82. a. Which species will react strongly with one another

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Answer:

The HCl react strongly with NaA

Explanation:

The buffer is an aqueous mixture of a weak acid and its conjugate base, or vice versa.

In the problem, you have the weak acid, HA, in a mixture with the conjugate base, NaA. A strong acif as HCl is added. The acids react with bases, the only base present is NaA, that means:

The HCl react strongly with NaA

The reaction is:

HCl + NaA → NaCl + HA