Consider the following reactions: 1. HA + OH^- = A^- + H2O 2. HA + H3O+ = H2A^+

Question

Consider the following reactions:

1. HA + OH^- = A^- + H2O

2. HA + H3O+ = H2A^+ + H2O

3. HA + H2O = H3O^+A^-

4. HA + OH^- = H3O^+ + A^-

5. A^- + H3O^+ = HA + H2O

6. A^- + H2O = HA + OH^-

7. A^- + OH^- = HA + O2^-

A. which of these reactions (enter only the reaction number 1 to 7) best describes how adding OH- converts the weak acid to conjugate base and forms a buffer?

B. which of the above reactions (enter only the reaction number 1 to 7) shows how a solution containing a conjugate base can be converted to a buffer solution by adding a strong acid?

Explanation / Answer

A. the reaction number 1 of these reactions best describes when adding OH- converts the weak acid to conjugate base and forms a buffer

1. HA + OH^- = A-^- + H2O

B. the reaction number 5 of the above reactions shows when a solution containing a conjugate base can be converted to a buffer solution by adding a strong acid

5. A^- + H3O^+ = HA + H2O

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