A free printable acid-base titration worksheet for Grade 11 chemistry.
This free titration worksheet takes students through an acid-base titration from the lab bench to the final calculation. They learn the vocabulary, balance neutralization equations, read drawn burette scales at the meniscus, and average concordant titres from a results table.
The calculation section covers 1:1 and 1:2 mole ratios, including H₂SO₄ and Ca(OH)₂. Students finish by reading a titration curve and choosing the right indicator. Every number in the answer key, including the curve itself, was calculated and checked.
| Part | Skill practised | Marks |
|---|---|---|
| A | Titration vocabulary | 3 |
| B | Neutralization equations | 3 |
| C | Reading a burette and concordant titres | 3 |
| D | Titration calculations (1:1 and 1:2 ratios) | 7 |
| E | Titration curve and indicators | 4 |
| F | Spot the mistake | 2 |
It supports the Ontario Grade 11 chemistry curriculum expectations in the Solutions and Solubility unit.
| Term | Meaning |
|---|---|
| Titrant | The solution of known concentration added from the burette |
| Analyte | The solution of unknown concentration in the flask |
| Burette | A long graduated tube with a tap, used to add solution drop by drop |
| Equivalence point | The point where moles of acid and base have reacted exactly, according to the equation |
| End point | The point where the indicator changes colour |
| Standard solution | A solution whose concentration is known accurately |
In a titration, a standard solution (the titrant) is added from a burette to a measured volume of the analyte until the reaction is complete. For background, see titration on Wikipedia.
A burette reads from the top down. Read at eye level, at the bottom of the meniscus, to the nearest 0.05 mL. In Part C of the titration worksheet, the initial reading is 1.20 mL and the final reading is 24.65 mL, so 23.45 mL of NaOH was added. Students then average the concordant titres (23.45, 23.40 and 23.45 mL) to get 23.43 mL, leaving out the rough trial.
Every titration calculation follows the same three steps:
For example, if 18.40 mL of 0.150 mol/L NaOH neutralizes 25.00 mL of HCl, then n(NaOH) = 0.002760 mol = n(HCl), and [HCl] = 0.002760 ÷ 0.02500 = 0.110 mol/L. With H₂SO₄, the ratio is 1 : 2, so divide the moles of NaOH by 2. The molarity worksheet reviews n = c × V, and the limiting reactant worksheet practises mole ratios.
When 0.100 mol/L NaOH is added to 25.0 mL of 0.100 mol/L HCl, the pH starts at 1.00, rises slowly, then jumps sharply at the equivalence point (25.0 mL, pH 7). A good indicator changes colour inside that jump.
| Indicator | pH range | Colour change |
|---|---|---|
| Methyl orange | 3.1–4.4 | red → yellow |
| Bromothymol blue | 6.0–7.6 | yellow → blue |
| Phenolphthalein | 8.2–10.0 | colourless → pink |
For a strong acid–strong base titration, bromothymol blue changes right at pH 7. The pH calculations worksheet shows how each point on the curve is calculated.
These questions match the titration worksheet PDF, which has full-size burette diagrams, the results table and ruled working space.
Questions 1–6: match each term to its meaning.
Open each part of the titration worksheet answers to check your work. The printable key is at the end of the PDF.
Review with the acids and bases quiz and the acids, bases and pH scale quiz.
Yes. The worksheet and its answer key are free to download and print as a PDF, with no account needed.
Find the moles of titrant with n = c × V, use the mole ratio from the balanced equation to get the moles of analyte, then divide by the analyte volume in litres.
The equivalence point is where the acid and base have reacted in exactly the ratio of the equation. The end point is where the indicator changes colour. A good indicator makes them almost the same.
Concordant titres are repeat results that agree closely, usually within 0.10 mL. Only these are averaged; the rough first trial is left out.
It is written for Grade 11 chemistry (the Solutions and Solubility unit) and works as review for Grade 12 chemistry.
Ready to start? Download the free titration worksheet PDF (use the Download button above), print it double-sided, and keep the answer key pages for marking.