Quiz 1 - Mol Concept, Calculations, UV vis spectroscopy, Acid Base Titrations Flashcards
Spectroscopic analytical methods are based on measuring what?
The amount of radiation absorbed or produced by molecules or atoms
What is spectroscopy?
Measuring the interactions of radiation and matter
List all types of electromagnetic waves included in the spectral region in descending order of power (7)
Gamma (y) rays
X rays
UltraViolet (UV)
Visible
Infrared (IR)
Microwave
Radio-Frequency (RF)
True or False:
Spectroscopy can be used for qualitative and quantitative analysis?
True
True or False:
Spectroscopy can be used the analysis of organic and inorganic compounds?
True
True or False:
Spectroscopy can be used to identify (elucidate) the molecular structure of molecules?
True
What is electromagnetic radiation?
Energy that is transmitted through space which oscillates through the electric and magnetic field
True or False:
Oscillations in the electric and magnetic field are perpendicular to each other?
True
Describe wavelength, what symbol is used to represent it
Wavelength is the distance between 2 maxima/minimum of a wave
The symbol used to represent it is λ (Lambda)
True or False:
Oscillations in the electric and magnetic field are perpendicular to each other BUT are also perpendicular to what other factor?
Direction of propagation
Properties of electromagnetic waves? (4)
Wavelength
Frequency
Velocity
Amplitude
Which axis does the magnetic field oscillate on?
Z-axis
Which axis does the electric field oscillate on?
Y-axis
Direct of propagation of a wave follows which axis
X-axis
Describe Amplitude, what letter is used to represent it?
A measure of the electric or magnetic field strength at a maximum peak wave - 0 on y-axis to maxima
Represented by the letter (A)
Describe Frequency, what letter is used to represent it, what unit is used for it?
The number of oscillations of a wave per second
Represented by the letter (v)
Hertz (Hz)
Which once of the following is a vector?
Amplitude
Wavelength
Frequency
Amplitude
Frequency is [blank] proportional to Wavelength?
[A] Directly
[B] Inversely
[B] Frequency is INVERSLY proportional to Wavelength
Meaning that as wavelength increases (longer waves), frequency decreases (less oscillations per second)
As wavelength decreases (shorter waves), frequency increases (more oscillations per second)
What is the speed of light? What letter is used to represent it?
3x10^8
(c) is used to represent it
