Buffers - NaOH to 25.0mL of 0.100M lactic acid (Ka =...

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CHEM 2B: Buffers Clemens Please note: for some of these problems I did not include the Ka or Kb value. Use your chart in your textbook to look up these values, if you need them. 1. Calculate the pH of a 0.015M NaHCO 3 (you will need to look up the Ka/Kb values). 2. What might be a good buffer system (combination) to use if you wanted to prepare a solution with pH = 4.5? 3. Calculate the pH of a solution that is 0.25M HF and 0.10M NaF. 4. What is the pH of a solution that results from adding 25.0mL of 0.0500M
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Unformatted text preview: NaOH to 25.0mL of 0.100M lactic acid (Ka = 1.4x10-4 ). 5. What mass of potassium carbonate must be added to 1.00L of 0.100M KHCO 3 to prepare a buffer solution with pH = 11.0? 6. consider 100.0mL of buffer solution containing 0.15M Na 2 HPO 4 and 0.10M KH 2 PO 4. What is the pH of the buffer solution? b) what is the pH after the addition of 80.0mL of 0.010M NaOH to the buffer solution? c) what is the pH after 10.0mL of 1.0M HNO 3 is added to the buffer?...
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Buffers - NaOH to 25.0mL of 0.100M lactic acid (Ka =...

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