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Pharmaceutical Analytical Chemistry II - Complexometric Titrations

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Pharmaceutical Analytical Chemistry II - Complexometric Titrations

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Questions and Answers

Based on the information provided, what is the coordination number of Ni2+ in the complex Ni(CN)4-?

4 (correct)

Which of the following statements about chelating agents is true?

Chelates do not form coordinate bonds.

Chelates are less stable than linear complexes.

Chelates have 2 donor sites.

Chelates are more stable than linear complexes. (correct)

What is the term used to describe the number of donor sites in a chelating agent?

Ligand

Coordination number

Dentate (correct)

Complexation

In complexometric titrations, what type of curve is observed when a stable chelate is formed in one step?

A curve with a single steep inflection region Signup and view all the answers

Which of the following complexes has a coordination number of 2?

Ag(NH3)2+ Signup and view all the answers

What type of bond is formed between a metal and a ligand in a complex?

Coordinate bond Signup and view all the answers

Which of the following statements accurately describes the formation of a metal-ligand complex?

The ligand donates both shared electrons in the coordinate bond. Signup and view all the answers

What is the primary advantage of using a chelating agent in complexometric titrations?

Chelates form multiple coordinate bonds, increasing complex stability. Signup and view all the answers

In the complex Fe(CN)6³⁻, what is the coordination number of the iron(III) ion?

6 Signup and view all the answers

Which of the following statements best describes the shape of the titration curve in a complexometric titration involving a stable chelate formation?

The curve has a single, steep inflection region, indicating a one-step complex formation. Signup and view all the answers

What is the term used to describe chelating agents with four donor sites?

Tetradentate Signup and view all the answers

In the complex Zn(NH₃)₄²⁺, what is the coordination number of the zinc(II) ion?

4 Signup and view all the answers