Gravimetric Analysis Quiz

What is the primary purpose of a precipitation reaction in gravimetric analysis?

• To dissolve the sample completely

• To form an insoluble compound for measurement

• To increase the solubility of the sample

• To change the colour of the solution

Which of the following is a common filtration technique used in gravimetric analysis?

• Distillation

• Centrifugation

• Vacuum filtration

• Decantation

What is the first step in sample preparation for gravimetric analysis?

• Drying the sample

• Dissolving the sample in a suitable solvent

• Weighing the sample

• Filtering the sample

Which instrument is most commonly used for mass measurement in gravimetric analysis?

• Spring balance

• Analytical balance

• Beam balance

• Digital scale

How is the molar mass of a compound calculated?

• By adding the atomic masses of all atoms in the compound

• By dividing the atomic mass by Avogadro's number

• By multiplying the atomic number by the number of atoms

• By subtracting the atomic number from the atomic mass

What is the purpose of using an analytical balance in gravimetric analysis?

• To measure the volume of a liquid

• To measure the mass of a sample with high precision

• To measure the temperature of a solution

• To measure the density of a solid

Which of the following is a key characteristic of a good precipitate in gravimetric analysis?

• It should be highly soluble in water

• It should be easily filterable

• It should be volatile

• It should be coloured

What is the role of a desiccator in gravimetric analysis?

• To heat the sample

• To cool the sample

• To keep the sample dry

• To dissolve the sample

Which of the following is NOT a method of sample preparation in gravimetric analysis?

• Dissolution

• Precipitation

• Evaporation

• Chromatography

What is the significance of using a drying oven in gravimetric analysis?

• To increase the solubility of the precipitate

• To remove moisture from the precipitate

• To change the colour of the precipitate

• To dissolve the precipitate