What is the pH at the equivalence point in a strong acid - strong base titration?

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Prepare for the NANTeL Chemistry Certification and Engineering Fundamentals Test with multiple choice questions, detailed explanations, and key insights to boost your understanding and confidence. Ace your exam!

Multiple Choice

What is the pH at the equivalence point in a strong acid - strong base titration?

Explanation:
In a strong acid–strong base titration, the equivalence point leaves a neutral solution. When all the acid has been neutralized by the base, the solution contains only the salt formed from the ions of the acid and base. These ions come from strong electrolytes and do not hydrolyze significantly in water, so there’s no excess H3O+ or OH−. Water’s own ionization then sets the pH, giving about 7 at room temperature. The exact value is only slightly affected by temperature, not by the concentrations of the titrant or analyte. So the pH at the equivalence point is essentially 7.

In a strong acid–strong base titration, the equivalence point leaves a neutral solution. When all the acid has been neutralized by the base, the solution contains only the salt formed from the ions of the acid and base. These ions come from strong electrolytes and do not hydrolyze significantly in water, so there’s no excess H3O+ or OH−. Water’s own ionization then sets the pH, giving about 7 at room temperature. The exact value is only slightly affected by temperature, not by the concentrations of the titrant or analyte. So the pH at the equivalence point is essentially 7.

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