Analyzing Substances: Advanced Techniques
A Grade 12 Chemistry worksheet focusing on advanced analytical techniques such as spectroscopy, chromatography, and mass spectrometry.
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Analyzing Substances: Advanced Techniques
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Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. Which analytical technique is primarily used to determine the molecular weight and elemental composition of a compound?
Infrared Spectroscopy
UV-Vis Spectroscopy
Mass Spectrometry
Gas Chromatography
2. In gas chromatography, what is the purpose of the stationary phase?
To carry the sample through the column
To separate components based on their boiling points and interactions
To detect the separated components
To vaporize the sample
1. In spectroscopy, the interaction of electromagnetic radiation with matter is used to obtain information about the of the substance.
2. High-performance liquid chromatography (HPLC) is a type of chromatography that uses a pressure to force the mobile phase through a column.
3. The parent ion in a mass spectrum represents the molecular ion of the compound.
1. Briefly explain the principle of operation of Infrared (IR) Spectroscopy and what type of information it provides about a molecule.
2. Describe the main differences between normal-phase and reversed-phase chromatography.
1. Atomic Absorption Spectroscopy (AAS) is primarily used for the quantitative analysis of organic compounds.
True
False
2. In mass spectrometry, fragmentation patterns can help in the structural elucidation of a molecule.
True
False
Match the analytical technique with its primary application.
1. NMR Spectroscopy
a. Separation of volatile compounds
2. Gas Chromatography
b. Determination of molecular structure
3. UV-Vis Spectroscopy
c. Quantification of metal ions
4. Atomic Absorption Spectroscopy
d. Quantification of conjugated systems
Examine the following diagram of a spectroscopy setup and answer the questions.
1. Based on the components shown, what type of spectroscopy is most likely being performed?
2. What is the role of the detector in this setup?