Exhibit 16-3 Consider the Titration Curve Below for the Titration

question 72

Multiple Choice

Exhibit 16-3 Consider the Titration curve below for the titration of a weak acid ,CH ₃COOH , with a strong base , NaOH, to answer the following question(s) . CH ₃COOH + NaOH CH ₃COONa + H₂ O
Refer to Exhibit 16-3. What approach listed below would be used to solve for the pH at the equivalence point on this titration curve?

• A) The pH at the equivalence point for a weak acid equals 7.0.
• B) The pH equals the p K _a of the weak acid at the equivalence point.
• C) The pH at the equivalence point can be determined by substituting the original molar concentration of the weak acid into the equation: pH = - log[HA].
• D) The Henderson-Hasselbalch equation can be used to solve for the pH at the equivalence point.
• E) The pH at the equivalence point must be solved as a problem of equilibrium involving a basic salt.

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