Chemical Compound Analysis: Quantitative vs Qualitative

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What type of analysis is based on measurement and counting?

Random analysis

Systematic analysis

Quantitative analysis (correct)

Qualitative analysis

Which type of errors are consistent mistakes that happen in the same way each time a measurement is taken?

Predictable errors

Random errors

Systematic errors (correct)

Calculated errors

What aspect of a measurement is affected by systematic errors?

Mean value

Accuracy (correct)

Precision

Standard deviation

In analytical science, what does precision refer to?

Variation in repeated measurements Signup and view all the answers

What property helps in determining the object being analyzed in qualitative analysis?

Compound structure Signup and view all the answers

Which type of error includes unpredictable variations that can occur by chance?

Random errors Signup and view all the answers

What is the unit of measurement for frequency?

Hertz Signup and view all the answers

What is the wavelength measured in?

Meters Signup and view all the answers

What happens to the wavelength as the frequency increases?

Decreases Signup and view all the answers

What is the unit of measurement for amplitude?

Meters Signup and view all the answers

What is reflected by objects that appear colored?

Some colors of the spectrum Signup and view all the answers

What is the unit of measurement for wavelength?

Nanometers Signup and view all the answers

What does UV spectroscopy measure in a sample?

Wavelength absorbed Signup and view all the answers

Which law is UV spectroscopy similar to according to the text?

Beer Lambert Law Signup and view all the answers

What does 'ε' represent in the Beer Lambert Law?

Extinction coefficient Signup and view all the answers

What is the primary use of infrared spectroscopy in organic compounds?

Identifying functional groups Signup and view all the answers

How are different types of bonds and functional groups identified in infrared spectroscopy?

Based on specific absorption bands Signup and view all the answers

What type of energy makes the bonds of molecules stretch and bend when absorbed?

Infrared energy Signup and view all the answers

What is the function of an infrared spectrometer?

Measure absorbed frequencies by molecules Signup and view all the answers

Which statement is true about the relationship between infrared and UV frequencies?

Infrared has higher wavelength than UV Signup and view all the answers

What do nuclear magnetic resonance spectrometry (NMR) analyze primarily?

Chemical environment of atoms Signup and view all the answers

What does a carbon-13 NMR spectrum indicate?

Type of carbon atoms present in a compound Signup and view all the answers

How is the information from an NMR spectrum used to confirm the existence of functional groups in a compound?

By analyzing the peaks corresponding to different carbon environments Signup and view all the answers

What does the number of peaks in a proton NMR spectrum indicate?

The number of hydrogen atoms in a structure Signup and view all the answers

What information does the chemical shift, δ, in a 1H NMR spectrum provide?

The type of proton environment Signup and view all the answers

How do hydrogen atoms joined to carbon atoms behave in a 1H NMR spectrum compared to those joined to other atoms like oxygen?

They give peaks at different frequencies Signup and view all the answers

What does the integration (long S) in a proton NMR spectrum indicate?

The total number of carbons per section/environment Signup and view all the answers

In a 1H NMR spectrum, what information do the relative peak areas provide?

The number of hydrogen atoms in a particular environment Signup and view all the answers

What does the splitting of peaks in a 1H NMR spectrum provide information about?

Adjacent protons Signup and view all the answers