Titrations in Analytical Chemistry

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What is the major difference between the equivalence point and the end point in a titration?

Color change

Chemical reaction

Volume difference (correct)

Physical change

Why are weak acids and bases never used as standard reagents in acid-base titrations?

They are colorless

They react incompletely with analytes (correct)

They are too stable

They are too reactive

Why are HCl and NaOH classified as secondary standard solutions?

They are less pure than primary standards (correct)

They are highly stable

They react selectively with analytes

They react completely with analytes

In complexometric titration, what forms a covalent bond with a metal atom to produce a complex?

Ligand (D) Signup and view all the answers

What type of acid-base titration results in a solution with pH greater than 7 at the equivalence point?

Weak acid + strong base (A) Signup and view all the answers

Why is EDTA commonly used as a complexometric titrant?

It forms a colored complex with metal ions (A) Signup and view all the answers

What type of ligand has two groups available for covalent bonding?

Bidentate (D) Signup and view all the answers

In precipitation titration, what method is based on the formation of slightly soluble precipitates?

Precipitation titration (B) Signup and view all the answers

Which method of detection of endpoint utilizes adsorption indicators?

Fajans Method (B) Signup and view all the answers

What does an acid-base indicator do in a titration?

Undergoes color change near the equivalence point (C) Signup and view all the answers

Why is AgCl ppt. in the Volhard method filtered before undertaking the back titration?

To prevent interference with the back titration (D) Signup and view all the answers

In the Volhard method, why must the solution be a strong acid?

To avoid side reactions involving hydroxide ions (B) Signup and view all the answers

Why is the pH range of Mohr method titration specified to be between 6.5-9?

To avoid unwanted precipitate formation (B) Signup and view all the answers

Why is the Volhard method rarely used nowadays?

It is time-consuming due to multiple steps involved (D) Signup and view all the answers

Why does the first drop of excess Ag+1 react with Fluorescein indicator in the Volhard method?

To indicate the endpoint of the titration (C) Signup and view all the answers

Why does the Mohr method not use CrO4-2 for titrations involving Ag+1?

CrO4-2 forms a complex that interferes with endpoint detection (C) Signup and view all the answers

Why does the Volhard method not use for determination of SCN-1?

Scn-1 forms a colored complex that affects endpoint detection (A) Signup and view all the answers

What is the purpose of using a strong acid solution in the Volhard method?

To prevent side reactions involving hydroxide ions (B) Signup and view all the answers

Why do types of redox indicators differ based on their oxidized and reduced forms' colors?

To provide visual cues for endpoint detection during titrations. (C) Signup and view all the answers

In oxidation-reduction reactions, what characterizes an oxidizing agent?

Substance that accepts electrons and gets oxidized. (A) Signup and view all the answers

What is the purpose of titration methods in Analytical Chemistry?

To measure the quantity of a reagent needed to react with the analyte completely (A) Signup and view all the answers

What is the function of a standard solution in volumetric titrations?

To be a solution of known concentration (C) Signup and view all the answers

When is back-titration used in titration methods?

When stability of the standard solution is a concern (A) Signup and view all the answers

What is the Equivalence point in a titration?

The point when added standard reagent equals the analyte (D) Signup and view all the answers

Which statement best describes an Analyte in titration methods?

It's a solution of unknown concentration but known volume (B) Signup and view all the answers

In a volumetric titration, why is it important to measure the volume of the standard solution needed for complete reaction?

To know how much reagent is needed for complete reaction (A) Signup and view all the answers

What does the End Point indicate in a titration?

The completion of the titration reaction (C) Signup and view all the answers

How is back-titration different from direct titration?

In back-titration, an excess of one standard solution reacts with an analyte first. (A) Signup and view all the answers

What is the role of the burette in volumetric titrations?

To deliver controlled amounts of standard solution to the analyte. (B) Signup and view all the answers

When is a back-titration preferred over direct titration?

When there are issues with slow reactions or unstable standard solutions. (C) Signup and view all the answers

Titrations in Analytical Chemistry

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Questions and Answers

What is the major difference between the equivalence point and the end point in a titration?

Why are weak acids and bases never used as standard reagents in acid-base titrations?

Why are HCl and NaOH classified as secondary standard solutions?

In complexometric titration, what forms a covalent bond with a metal atom to produce a complex?

What type of acid-base titration results in a solution with pH greater than 7 at the equivalence point?

Why is EDTA commonly used as a complexometric titrant?

What type of ligand has two groups available for covalent bonding?

In precipitation titration, what method is based on the formation of slightly soluble precipitates?

Which method of detection of endpoint utilizes adsorption indicators?

What does an acid-base indicator do in a titration?

Why is AgCl ppt. in the Volhard method filtered before undertaking the back titration?

In the Volhard method, why must the solution be a strong acid?

Why is the pH range of Mohr method titration specified to be between 6.5-9?

Why is the Volhard method rarely used nowadays?

Why does the first drop of excess Ag+1 react with Fluorescein indicator in the Volhard method?

Why does the Mohr method not use CrO4-2 for titrations involving Ag+1?

Why does the Volhard method not use for determination of SCN-1?

What is the purpose of using a strong acid solution in the Volhard method?

Why do types of redox indicators differ based on their oxidized and reduced forms' colors?

In oxidation-reduction reactions, what characterizes an oxidizing agent?

What is the purpose of titration methods in Analytical Chemistry?

What is the function of a standard solution in volumetric titrations?

When is back-titration used in titration methods?

What is the Equivalence point in a titration?

Which statement best describes an Analyte in titration methods?

In a volumetric titration, why is it important to measure the volume of the standard solution needed for complete reaction?

What does the End Point indicate in a titration?

How is back-titration different from direct titration?

What is the role of the burette in volumetric titrations?

When is a back-titration preferred over direct titration?

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