Table of contents

1. Chemical Measurements1h 50m
2. Tools of the Trade1h 17m
3. Experimental Error1h 52m
4 & 5. Statistics, Quality Assurance and Calibration Methods1h 57m
6. Chemical Equilibrium3h 41m
7. Activity and the Systematic Treatment of Equilibrium1h 0m
8. Monoprotic Acid-Base Equilibria1h 53m
9. Polyprotic Acid-Base Equilibria2h 17m
10. Acid-Base Titrations2h 37m
11. EDTA Titrations1h 34m
12. Advanced Topics in Equilibrium1h 16m
13. Fundamentals of Electrochemistry2h 19m
14. Electrodes and Potentiometry41m
15. Redox Titrations1h 14m
16. Electroanalytical Techniques57m
17. Fundamentals of Spectrophotometry50m

1. Chemical Measurements

Volumetric Analysis

Analytical Chemistry

1. Chemical Measurements

Volumetric Analysis

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Multiple Choice

In volumetric analysis, what is the process of analyzing a smaller, representative portion of a sample cube called?

Calibration

Titration

Dilution

Subsampling

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Verified step by step guidance

Understand the concept of subsampling: Subsampling is the process of taking a smaller, representative portion of a larger sample for analysis. This ensures that the analysis is manageable while still accurately reflecting the properties of the entire sample.

Recognize the importance of subsampling in volumetric analysis: In volumetric analysis, subsampling is crucial because it allows chemists to work with a smaller, more practical amount of material while maintaining the integrity of the sample's composition.

Differentiate subsampling from other processes: Calibration involves adjusting instruments to ensure accurate measurements, titration is a method to determine the concentration of a solution, and dilution involves reducing the concentration of a solution. Subsampling is distinct because it focuses on selecting a representative portion of the sample.

Consider the application of subsampling: Subsampling is often used in scenarios where the sample is too large or impractical to analyze in its entirety, such as solid cubes, powders, or liquids in large volumes.

Ensure proper technique during subsampling: To maintain accuracy, the subsampled portion must be representative of the entire sample. This may involve homogenizing the sample before subsampling or using specific tools to extract a uniform portion.