At the equivalence point of a strong acid-strong base titration, all of the acid and base have reacted, producing water and a salt. What affects the pH at this point in the titration?

• A. The pH is neutral and is not affected by any of these factors
• B. The concentration of the salt formed
• C. The strength of the acid and base
• D. The temperature of the solution

Answer: (A)

Verified step by step guidance

1. Understand the concept of equivalence point: In a strong acid-strong base titration, the equivalence point is reached when the amount of acid equals the amount of base, resulting in complete neutralization.
2. Recognize the products formed: At the equivalence point, the reaction between the strong acid and strong base produces water (H₂O) and a salt. The salt is typically neutral in nature.
3. Consider the nature of the acid and base: Since both the acid and base are strong, they completely dissociate in water, meaning the resulting solution at the equivalence point is neutral.
4. Evaluate the factors affecting pH: The concentration of the salt formed does not affect the pH at the equivalence point because the salt is neutral. Similarly, the strength of the acid and base does not affect the pH because they are both strong and fully dissociate.
5. Assess the impact of temperature: While temperature can affect reaction rates, it does not change the neutral pH at the equivalence point in a strong acid-strong base titration.