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Acid-Base Titration Curves Questions and Answers
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Acid-Base Titration Curves Questions and Answers Acid-Base Titration Curves Titration curves show how pH varies during titration Strong Acid-Strong Base Titration Curve 1) Strong Acid-Strong Base Titration Curve. Due to the nature of the log scale i.e. a ten fold change in the [H+] is req...

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  • October 2, 2024
  • 4
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • acid base titration curves questions and answers
  • acid base titration curves titration curves show h
  • variations on strong acid strong base titrations d

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Acid-Base Titration Curves Questions
and Answers
Acid-Base Titration Curves - answer Titration curves show how pH varies during
titration

Strong Acid-Strong Base Titration Curve - answer 1) Strong Acid-Strong Base
Titration Curve. Due to the nature of the log scale i.e. a ten fold change in the [H+] is
required to result in a change in pH of only one unit.

2) The pH then increases much more rapidly, and between a pH of about 3.5 and 10.5,
the curve is virtually vertical
This is due to the fact that the [H+] is low and adding NaOH has a larger effect on the
pH. Equivalence point is 7

3) Equivalence point is 7, the strong acid and strong base have completely reacted with
each other to form salt and water. At this point, there is no H+ ions from the SA in the
solution. The [H+] in the solution is due to dissociation of water.

4) After the equivalence point, the pH changes only gradually again and as more as
more NaOH is added, the pH gets closer to 13
All the acid has been neutralised and the OH-ions are in excess in this region

Variations on Strong Acid-Strong Base Titrations - answer Double the conc of base =
eqivalance point at half original volume.

Double conc base and acid = shape the same, lower start ph and higher end ph

Adding acid to alkalai = flipping the curve

Calculating the points on a Strong acid-Strong base titration curve - answer Full
dissociation, conc HCl = conc H+. pH at equivalance point = 7

Calculating the points on a Weak acid-Strong base titration curve - answer Find
initial pH using the existing Ka value. pH at the equivalence point is more than 7. Weak
salt, conjugate base (strong), reacting with water to release HO- ions. With cotinual
addition, it will reach the pH of the base.

Why is H2O pH 7 - answer Dissosiation of H+ and OH- ions

SA-SB titration curve vs WA-SB titration curve - answer SA-SB = Less steep, starts
with a lower pH

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