Practice 10 questions on CHM2354 - Analytical Chemistry at uOttawa - University of Ottawa. Free AI-generated quiz on uNotes — track your score, retake anytime.
1In the context of electrochemical analysis, what does the standard deviation of a set of measurements represent regarding the data's quality?
2When analyzing a sample containing both CuSO₄ and CuCl₂ where half the Cu²⁺ is in each form, and given the ppm of total Cu²⁺, how is the ppm of CuSO₄ calculated?
3In a gravimetric analysis where a mixture containing FeSO₄(NH₄)₂SO₄·6H₂O and FeCl₂·6H₂O is converted to Fe₂O₃, what information can be directly obtained from the mass of Fe₂O₃ formed?
4For the ionization of lactic acid (HA $
ightleftharpoons$ H⁺ + A⁻) with a given Ka, if the pH of the solution is significantly lower than the pKa, what can be concluded about the relative concentrations of HA and A⁻?
5In acid-base titrations, the equivalence point is defined as:
6When preparing a buffer solution with Tris, if the volume of water is doubled while keeping the mass of Tris and TrisH⁺ the same, how does the pH of the buffer change?
7For a polyprotic acid like histidine, which has multiple ionization constants (K₁, K₂, K₃), the pH at the second equivalence point of its titration with a strong base corresponds to:
8Consider the redox reaction: UO₂²⁺ + Sn²⁺ + 4H⁺ ⇌ Sn⁴⁺ + U⁴⁺ + 2H₂O with E° = 0.180 V. What does a very large equilibrium constant ($K_{eq} imes 10^6$) calculated from this E° suggest about the reaction?
9In liquid-liquid extraction, the partition coefficient (K) of a solute X between an organic solvent and water is 6.50. If 1.17 mmol of X is found in 10.0 mL of the organic phase after one extraction, what was the concentration of X in the aqueous phase immediately before this extraction?
10Which type of chromatography involves solutes interacting with counter-ions bound to a stationary phase, based on their charge?
