Titration, Buffers & Neutralization Curves — Drills · Grade 11 Science
Chapter: Acids, Bases & TitrationWhat these drills covers
By the end of Titration, Buffers & Neutralization Curves you should be able to:
- I can distinguish endpoint from stoichiometric equivalence.
- I can calculate a buffer pH and explain finite buffer capacity.
2 questions, numeric and written answer, each with a worked explanation.
Vocabulary used: endpoint, equivalence point, buffer capacity.
Problem 1
A buffer has equal conjugate species with pKa=4.5. Find pH.
Hints
Write the relationship first; substitute with consistent units.
Answer and explanation
4.5
log 1=0.
Problem 2
Why is a weak-acid titration’s equivalence often above pH 7?
Answer and explanation
The remaining conjugate base accepts protons from water, producing OH⁻.
Response criteria
- State a scientifically accurate conclusion.
- Show the calculation or mechanism that supports it.
- Include units, conditions, or limits where relevant.