on 4. A weak acid (HA) has a pKa of 5. Suppose you have 120 mL of a HA and its conjugate base A- at pH 5.6. (Note: not 1M of each, but a total concentration of 1M of both acid and conjugate base together). To this 1M buffer solution, is added 10 mL of 1.0 M HCL. What is the pH of the resulting solution? What would be the pH of the solution if 10mL of 1M HCL were added to 120ml pure water without the presence of the buffer?

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4. A weak acid (HA) has a pKa of 5. Suppose you have 120 mL of a 1.0 M solution of
HA and its conjugate base A- at pH 5.6. (Note: not 1M of each, but a total concentration
of 1M of both acid and conjugate base together). To this 1M buffer solution, is added 10
mL of 1.0 M HCL. What is the pH of the resulting solution? What would be the pH of the
solution if 10mL of 1M HCL were added to 120mL pure water without the presence of
the buffer?
Transcribed Image Text:4. A weak acid (HA) has a pKa of 5. Suppose you have 120 mL of a 1.0 M solution of HA and its conjugate base A- at pH 5.6. (Note: not 1M of each, but a total concentration of 1M of both acid and conjugate base together). To this 1M buffer solution, is added 10 mL of 1.0 M HCL. What is the pH of the resulting solution? What would be the pH of the solution if 10mL of 1M HCL were added to 120mL pure water without the presence of the buffer?
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