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A titration curve is a graph of pH (y-axis) against volume of titrant added (x-axis). It shows how the pH of the solution in the conical flask changes as the titrant is added from the burette. The shape of the curve depends on the strengths of the acid and base involved.
Understanding titration curves is essential for choosing the correct indicator and for interpreting experimental data.
Consider titrating 25.0 cm³ of 0.10 mol dm⁻³ HCl with 0.10 mol dm⁻³ NaOH.
Key features of the curve:
The steep section spans a wide pH range (approximately 3 to 11), which means many indicators will work for this titration.
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