Medical Chemistry
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Questions and Answers

What is the formula for pH?

  • $pH = -log[OH^-]$
  • $pH = log[OH^-]$
  • $pH = log[H^+]$
  • $pH = -log[H^+]$ (correct)

    • In neutral water at 25°C, what is the value of pH?

  • 10
  • 0
  • 14
  • 7.00 (correct)

    • What is the relationship between pH and pOH?

  • $pH imes pOH = 14$
  • $pH - pOH = 14$
  • $pH + pOH = 14$ (correct)
  • $pH / pOH = 14$

    • What is the significance of using pH meters over indicators for measuring pH?

    <p>pH meters provide more precise results than indicators</p> Signup and view all the answers

    What is the composition of a buffer?

    <p>A weak acid and its conjugate base</p> Signup and view all the answers

    What is the formula for the Ka expression?

    <p>$Ka = \frac{[H^+][X^-]}{[HX]}$</p> Signup and view all the answers

    What is the Henderson-Hasselbalch equation used for?

    <p>To calculate the pH of a buffer solution</p> Signup and view all the answers

    What determines the buffer capacity?

    <p>The relative concentrations of the weak acid and its conjugate base</p> Signup and view all the answers

    What happens to the pH of a buffer when a small amount of OH- is added?

    <p>The pH remains more or less constant</p> Signup and view all the answers

    What is the result of adding a strong acid to a buffer?

    <p>The pH remains more or less constant</p> Signup and view all the answers

    What is the result of adding a strong base to a buffer?

    <p>The pH remains more or less constant</p> Signup and view all the answers

    What does the Henderson-Hasselbalch equation take into account?

    <p>The concentrations of both the weak acid and its conjugate base</p> Signup and view all the answers

    What is the buffer capacity at its best when?

    <p>When the concentration of the weak acid is equal to the concentration of the weak base</p> Signup and view all the answers

    What does the addition of a strong acid or base to a buffer result in?

    <p>A neutralization reaction</p> Signup and view all the answers

    What does the pOH measure?

    <p>The concentration of OH- ions</p> Signup and view all the answers

    What does the buffer solution resist?

    <p>A drastic change in pH</p> Signup and view all the answers

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