Analytical Chemistry

How many sites on the ethylenediaminetetraacetic acid are able to form dative covalent bonds with the metal ion?

• 2

• 4

• 6

• None of the above

Which type of ligand can form one dative covalent bond with the metal cation?

• Unidentate

• Bidentate

• Polydentate

• None of the above

What is the complexometric indicator that is normally used in EDTA-based titration?

• Eriocrome Black T

• Eriochrome Black T

• Erochrome Black T

• None of the above

What is the pH of the buffer solution used in a normal EDTA titration?

• 8

• 9

• 10

• 11

Which of the following describes an oxidation process?

• A substance loses electrons

• A substance decreases in oxidation state

• Both statement A and B

• Neither statement A or B

Which process happens when S turns to SO3 2-?

• Oxidising agent

• Oxidation

• Reducing agent

• Reduction

What is the oxidation number of P in P2O7 2-?

• +4

• +5

• +6

• None of the above

Which of the following is a type of particle size?

• Colloidal

• Crystalline

• Both A and B

• Neither A nor B

What does a desiccant do in the Precipitation Method?

• Further wets the precipitate

• Further dries the precipitate

• Further moistens the precipitate

• All of the above

What is the mole ratio between EDTA and metal cation in complexometric titration?

• 1:6

• 1:4

• 1:2

• 1:1