Which of the Statements Below Are True for the Titration

question 12

Multiple Choice

Which of the statements below are true for the titration of Fe²⁺ with standard Ce⁴⁺?
I The indicator electrode potential before the addition of Ce⁴⁺ solution is calculated using the Fe³⁺ half-reaction after calculating the equilibrium concentrations of Fe³⁺ and Fe²⁺ in solution.
II Before the equivalence point,the indicator electrode potential is calculated using the Fe³⁺ half-reaction because only [Fe³⁺] and [Fe²⁺] are known.
III At the equivalence point,the indicator potential is the average of E^o for Fe³⁺ and Ce⁴⁺.
IV After the equivalence point,the indicator electrode potential is calculated using the Ce⁴⁺ half-reaction because only [Ce⁴⁺] and [Ce²⁺] are known.

• A)II and IV
• B)II,III,and IV
• C)I,III,and IV
• D)I,II,and IV
• E)I,II,III,and IV

---

Definitions:

Synovial Membrane

The lining of the joint spaces that secretes synovial fluid for lubrication.

Articular Cartilage

Smooth, white tissue that covers the ends of bones where they come together to form joints.

Fibrous Capsule

A dense tissue layer that encloses a joint or some organs, providing support and protection.

Synovial Membrane

A distinct type of connective tissue that covers the inside of synovial joint capsules and surrounding tendon sheaths, secreting synovial fluid to provide lubrication.