4. Analytical Techniques

Titration Methods — Quiz

Test your understanding of titration methods with 5 practice questions.

Practice Questions

Question 1

A 25.00 cm^3 sample of sodium carbonate solution is titrated with 0.1500 mol dm^{-3} HCl. What volume of HCl is required to reach the equivalence point?

Question 2

A 20.00 cm^3 sample of Fe^{2+} solution is titrated with 0.05000 mol dm^{-3} KMnO$_4$. If 20.00 cm^3 of KMnO$_4$ is required at the endpoint (MnO$_4^- +5$ Fe$^{2+} +8$ H$^+$ → Mn$^{2+} +5$ Fe$^{3+} +4$ H$_2$O), what is the concentration of Fe^{2+}?

Question 3

A 1.00 g marble chip (CaCO$_3$) is dissolved in 25.00 cm^3 of 0.5000 mol dm^{-3} HCl. Excess acid is back‐titrated with 0.1000 mol dm^{-3} NaOH requiring 15.00 cm^3. What is the percentage by mass of CaCO$_3$ in the sample?

Question 4

During the titration of a weak acid HA (K$_a=1.8\times10^{-5}$) with a strong base, what is the pH at the half‐equivalence point?

Question 5

A 25.00 cm^3 sample of Ca^{2+} solution is titrated with 12.50 cm^3 of 0.01000 mol dm^{-3} EDTA, assuming a 1:1 stoichiometry. What is the concentration of Ca^{2+} in the sample?