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What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer with a pH of 4.00? (Ka for HF is 6.8 × 10⁻⁴)

Question

What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer with a pH of 4.00? (Ka for HF is 6.8 × 10⁻⁴)
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Solution 1

To solve this problem, we need to use the Henderson-Hasselbalch equation, which is:

pH = pKa + log([A-]/[HA])

Where:

  • pH is the negative log of the H+ concentration
  • pKa is the negative log of the Ka
  • [A-] is the concentration of the base (NaOH in this case)
  • [HA] is the concentration of the a Knowee AI is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI  is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI  is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI  is a powerful AI-powered study tool designed to help you to solve study problem.
Knowee AI  is a powerful AI-powered study tool designed to help you to solve study problem.
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