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Gravimetric Analysis

Description: Gravimetric analysis is a technique used in analytical chemistry to determine the concentration of an analyte in a sample by measuring the mass of the analyte or a compound containing the analyte.
Number of Questions: 14
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Tags: gravimetric analysis analytical chemistry
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What is the basic principle of gravimetric analysis?

  1. Measuring the mass of the analyte

  2. Measuring the volume of the analyte

  3. Measuring the concentration of the analyte

  4. Measuring the density of the analyte

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Correct Option: A
Explanation:

Gravimetric analysis is based on the principle that the mass of the analyte or a compound containing the analyte is proportional to the concentration of the analyte in the sample.

What are the two main types of gravimetric analysis?

  1. Precipitation gravimetry and volatilization gravimetry

  2. Precipitation gravimetry and combustion gravimetry

  3. Precipitation gravimetry and electrodeposition gravimetry

  4. Precipitation gravimetry and complexation gravimetry

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Correct Option: A
Explanation:

The two main types of gravimetric analysis are precipitation gravimetry and volatilization gravimetry.

What is precipitation gravimetry?

  1. A method of gravimetric analysis in which the analyte is precipitated from a solution

  2. A method of gravimetric analysis in which the analyte is volatilized from a solution

  3. A method of gravimetric analysis in which the analyte is electrodeposited from a solution

  4. A method of gravimetric analysis in which the analyte is complexed with a reagent

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Correct Option: A
Explanation:

Precipitation gravimetry is a method of gravimetric analysis in which the analyte is precipitated from a solution by adding a suitable precipitating agent.

What is volatilization gravimetry?

  1. A method of gravimetric analysis in which the analyte is precipitated from a solution

  2. A method of gravimetric analysis in which the analyte is volatilized from a solution

  3. A method of gravimetric analysis in which the analyte is electrodeposited from a solution

  4. A method of gravimetric analysis in which the analyte is complexed with a reagent

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Correct Option: B
Explanation:

Volatilization gravimetry is a method of gravimetric analysis in which the analyte is volatilized from a solution by heating.

What are the advantages of gravimetric analysis?

  1. High accuracy and precision

  2. Wide range of applications

  3. Relatively simple and inexpensive

  4. All of the above

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Correct Option: D
Explanation:

Gravimetric analysis offers high accuracy and precision, a wide range of applications, and is relatively simple and inexpensive.

What are the disadvantages of gravimetric analysis?

  1. Can be time-consuming

  2. Requires careful attention to detail

  3. Can be affected by impurities in the sample

  4. All of the above

Show answer
Correct Option: D
Explanation:

Gravimetric analysis can be time-consuming, requires careful attention to detail, and can be affected by impurities in the sample.

What are some common applications of gravimetric analysis?

  1. Determination of the purity of a substance

  2. Determination of the concentration of a substance in a solution

  3. Determination of the molecular weight of a substance

  4. All of the above

Show answer
Correct Option: D
Explanation:

Gravimetric analysis is used for a variety of applications, including the determination of the purity of a substance, the determination of the concentration of a substance in a solution, and the determination of the molecular weight of a substance.

What are some of the factors that can affect the accuracy of gravimetric analysis?

  1. The purity of the reagents

  2. The temperature of the experiment

  3. The pH of the solution

  4. All of the above

Show answer
Correct Option: D
Explanation:

The accuracy of gravimetric analysis can be affected by a number of factors, including the purity of the reagents, the temperature of the experiment, and the pH of the solution.

What are some of the precautions that should be taken when performing gravimetric analysis?

  1. Use clean glassware

  2. Use accurate measuring devices

  3. Follow the procedure carefully

  4. All of the above

Show answer
Correct Option: D
Explanation:

When performing gravimetric analysis, it is important to use clean glassware, use accurate measuring devices, and follow the procedure carefully.

What is the difference between a precipitate and a gravimetric precipitate?

  1. A precipitate is formed when two solutions are mixed, while a gravimetric precipitate is formed when a solution is evaporated

  2. A precipitate is formed when a solid is dissolved in a liquid, while a gravimetric precipitate is formed when a liquid is evaporated

  3. A precipitate is formed when a gas is dissolved in a liquid, while a gravimetric precipitate is formed when a liquid is evaporated

  4. A precipitate is formed when a solid is heated, while a gravimetric precipitate is formed when a liquid is evaporated

Show answer
Correct Option: A
Explanation:

A precipitate is formed when two solutions are mixed and a solid forms. A gravimetric precipitate is formed when a solution is evaporated and a solid forms.

What is the difference between a gravimetric factor and a gravimetric constant?

  1. A gravimetric factor is used to convert the mass of a precipitate to the mass of the analyte, while a gravimetric constant is used to convert the mass of the analyte to the mass of the precipitate

  2. A gravimetric factor is used to convert the volume of a precipitate to the mass of the analyte, while a gravimetric constant is used to convert the mass of the analyte to the volume of the precipitate

  3. A gravimetric factor is used to convert the concentration of a precipitate to the mass of the analyte, while a gravimetric constant is used to convert the mass of the analyte to the concentration of the precipitate

  4. A gravimetric factor is used to convert the temperature of a precipitate to the mass of the analyte, while a gravimetric constant is used to convert the mass of the analyte to the temperature of the precipitate

Show answer
Correct Option: A
Explanation:

A gravimetric factor is used to convert the mass of a precipitate to the mass of the analyte. A gravimetric constant is used to convert the mass of the analyte to the mass of the precipitate.

What is the difference between a gravimetric method and a volumetric method?

  1. A gravimetric method is based on the measurement of mass, while a volumetric method is based on the measurement of volume

  2. A gravimetric method is based on the measurement of concentration, while a volumetric method is based on the measurement of mass

  3. A gravimetric method is based on the measurement of temperature, while a volumetric method is based on the measurement of volume

  4. A gravimetric method is based on the measurement of pressure, while a volumetric method is based on the measurement of mass

Show answer
Correct Option: A
Explanation:

A gravimetric method is based on the measurement of mass, while a volumetric method is based on the measurement of volume.

What is the difference between a gravimetric analysis and a titrimetric analysis?

  1. A gravimetric analysis is based on the measurement of mass, while a titrimetric analysis is based on the measurement of volume

  2. A gravimetric analysis is based on the measurement of concentration, while a titrimetric analysis is based on the measurement of mass

  3. A gravimetric analysis is based on the measurement of temperature, while a titrimetric analysis is based on the measurement of volume

  4. A gravimetric analysis is based on the measurement of pressure, while a titrimetric analysis is based on the measurement of mass

Show answer
Correct Option: A
Explanation:

A gravimetric analysis is based on the measurement of mass, while a titrimetric analysis is based on the measurement of volume.

What is the difference between a gravimetric analysis and a colorimetric analysis?

  1. A gravimetric analysis is based on the measurement of mass, while a colorimetric analysis is based on the measurement of color

  2. A gravimetric analysis is based on the measurement of concentration, while a colorimetric analysis is based on the measurement of mass

  3. A gravimetric analysis is based on the measurement of temperature, while a colorimetric analysis is based on the measurement of color

  4. A gravimetric analysis is based on the measurement of pressure, while a colorimetric analysis is based on the measurement of mass

Show answer
Correct Option: A
Explanation:

A gravimetric analysis is based on the measurement of mass, while a colorimetric analysis is based on the measurement of color.

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