KVV E-Modules

What is titration?

A: a) A method for determining the boiling point of a solution B: b) A method of analysis to determine the volume of a test solution using a standard solution C: c) A method of separating chemical mixtures D: d) A process of crystallizing salts

Which solution is referred to as the titrant?

A: The solution of unknown concentration taken in a conical flask B: The solution of known concentration taken in a burette C: The solution used to indicate the end point D: The solution formed after neutralization

What is the function of an indicator in titration?

A: To neutralize the solution B: To bring about a visual color change at the end point of titration C: To increase the concentration of the solution D: To dissolve the analyte

What is the molecular formula of ammonium chloride?

A: NH3Cl B: NH4Cl C: NH2Cl D: NH4Cl2

What type of titration is involved in the assay of ammonium chloride?

A: Precipitation titration B: Acid-base titration C: Redox titration D: Complexometric titration

What is the molecular weight of ammonium chloride?

A: 50.5 B: 53.53 C: 55.45 D: 58.44

At what temperature does ammonium chloride melt?

A: 312°C B: 338°C C: 350°C D: 300°C

What reagent is used to liberate hydrochloric acid in the assay of ammonium chloride?

A: Sodium hydroxide solution B: Formaldehyde solution C: Phenolphthalein D: Sulfuric acid

What is the role of sodium hydroxide in this titration?

A: o neutralize hydrochloric acid B: To act as an indicator C: To precipitate ammonium chloride D: To dissolve ammonium chloride

What is the end point in titration?

A: The point at which the titrant is added in excess B: The point where the solution reaches saturation C: The point where the indicator shows a sharp color change indicating reaction completion D: The point where the solution evaporates