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12 Questions

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Analytical Chemistry Basics

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Questions and Answers

What is the primary goal of separation in chemical analysis?

To detect the presence of substance X

To quantitate the substance in the sample

To identify the substance in the sample

To separate the species of interest from the sample matrix (correct)

What is the main difference between qualitative and quantitative analysis?

Qualitative analysis answers 'what', while quantitative analysis answers 'how much' (correct)

Qualitative analysis is used for identification, while quantitative analysis is used for detection

Qualitative analysis answers 'how much', while quantitative analysis answers 'what'

Qualitative analysis is used for detection, while quantitative analysis is used for identification

What is the primary consideration when selecting an analytical method?

The location of the laboratory

The nature of the analytical problem (correct)

The cost of the instrument

The experience of the analyst

What type of analytical methods use color, indicators, boiling points, and odors for identification?

Classical methods Signup and view all the answers

What is the purpose of considering the concentration range of the analyte when selecting an analytical method?

To ensure the method is sensitive enough Signup and view all the answers

What is the purpose of considering the physical and chemical properties of the sample matrix?

To ensure the method is selective for the analyte Signup and view all the answers

What is the primary factor responsible for most phenomena in spectroscopy?

Electric field Signup and view all the answers

Which of the following is NOT a type of validation criterion for analytical methods?

Cost and availability of the equipment Signup and view all the answers

What is the term for the minimum amount of analyte that can be detected by a spectroscopic method?

Detection limit Signup and view all the answers

What is the model of electromagnetic radiation that views it as a stream of discrete particles or wave packets of energy?

Particle Model Signup and view all the answers

What is the term for the range of concentrations over which a spectroscopic method can provide a response?

Dynamic range Signup and view all the answers

What is the term for the ability of a spectroscopic method to distinguish between different analytes?

Selectivity Signup and view all the answers