Intermediate Topic 536 of 1102 Acids, Bases & Electrochemistry
Strong Acid Strong Base Titration
The equivalence point is at pH 7.
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In-depth explanation of Strong Acid Strong Base Titration
In the titration of a strong acid with a strong base, the pH before equivalence is set by the excess strong acid remaining, and after equivalence by the excess strong base. At the equivalence point the solution contains only sodium chloride and water, so the pH is exactly 7 at 25 C. The steep vertical section of the curve extends over several pH units, which allows many indicators to be used. Because both reactants are fully dissociated, the calculations are straightforward and depend only on the amounts added. This titration is the standard introduction to acid-base titration.
Going deeper: Strong Acid Strong Base Titration
Key ideas: Before equivalence, pH comes from excess H+: moles left divided by total volume. At equivalence, pH is exactly 7.00 (25 C). Afterwards use excess OH-. For 25.0 mL of 0.100 M HCl with 0.100 M NaOH, equivalence needs 25.0 mL; the pH jumps from about 3 to 11 within roughly 0.1 mL.
Common mistakes and connections: Mistakes: forgetting to add the titrant volume to the total when computing concentration, and using the original concentration after mixing. The steep jump is why many indicators (methyl orange to phenolphthalein) work. Conductivity falls then rises, with a minimum at equivalence.
Visualization of Strong Acid Strong Base Titration
0.100 M HCl titrated with 0.100 M NaOH: pH is exactly 7 at equivalence and the vertical section spans about pH 3 to 11, so many indicators work. The interactive lesson shows this as a live animation or chart.
Worked example and use case
Titrating 0.100 M HCl with 0.100 M NaOH gives pH 7 at the equivalence point.
Frequently asked questions about Strong Acid Strong Base Titration
What is Strong Acid Strong Base Titration?
The equivalence point is at pH 7.
Is Strong Acid Strong Base Titration a beginner, intermediate or advanced topic?
Strong Acid Strong Base Titration is a intermediate topic in Acids, Bases & Electrochemistry. It builds on the vocabulary of beginner topics in this area.
What should I learn before Strong Acid Strong Base Titration?
Study these earlier topics in Acids, Bases & Electrochemistry first: Equivalence Point, End Point, Titration Curve.
What comes after Strong Acid Strong Base Titration?
The next topics in Acids, Bases & Electrochemistry are Weak Acid Strong Base Titration and Acid-Base Indicators.
Can I practise Strong Acid Strong Base Titration with quizzes?
Yes. The interactive lesson includes a self-check question on Strong Acid Strong Base Titration, and the Acids, Bases & Electrochemistry quiz draws on every topic in this area.
Where Strong Acid Strong Base Titration fits in Acids, Bases & Electrochemistry
Strong Acid Strong Base Titration is topic 26 of 105 in Acids, Bases & Electrochemistry.