Gravimetric Method Analysis Exam

What is the primary principle of gravimetric analysis?

• Volume measurement

• Mass measurement

• Temperature measurement

• pH measurement

Which type of gravimetric analysis involves separating the analyte as a precipitate?

• Volatilization gravimetry

• Precipitation gravimetry

• Electrogravimetry

• Gravimetric titrimetry

What is the primary requirement for a precipitate in gravimetric analysis?

• High solubility

• Purity and stability

• High volatility

• Reactivity with oxygen

In volatilization gravimetry, the analyte is converted into:

• A solid precipitate

• A gas of known composition

• A liquid solution

• An insoluble compound

Which of the following is not a type of gravimetric analysis?

• Electrogravimetry

• Spectrophotometry

• Precipitation gravimetry

• Volatilization gravimetry

Which instrument is essential in gravimetric analysis for precise mass determination?

• Spectrophotometer

• Analytical balance

• Conductivity meter

• Titration burette

In precipitation gravimetry, what is the final step before weighing the precipitate?

• Dissolving the precipitate

• Drying or ignition to constant mass

• Filtering the precipitate

• Adding a secondary reagent

A specific reagent in gravimetric analysis reacts with:

• Many chemical species

• A single chemical species

• Any compound in the solution

• Precipitating agents only

Why should precipitates be washed during gravimetric analysis?

• To improve crystallization

• To remove impurities and adsorbed ions

• To increase the solubility of the precipitate

• To decrease particle size

What happens if a precipitate is not completely dried before weighing?

• The mass will be lower than expected

• The analysis remains unaffected

• The mass will be higher than expected

• The precipitate will dissolve