Quiz 1 - Mol Concept, Calculations, UV vis spectroscopy, Acid Base Titrations

Question 1

Spectroscopic analytical methods are based on measuring what?

Answer 1

The amount of radiation absorbed or produced by molecules or atoms

Question 2

What is spectroscopy?

Answer 2

Measuring the interactions of radiation and matter

Question 3

List all types of electromagnetic waves included in the spectral region in descending order of power (7)

Answer 3

Gamma (y) rays
X rays
UltraViolet (UV)
Visible
Infrared (IR)
Microwave
Radio-Frequency (RF)

Question 4

True or False:
Spectroscopy can be used for qualitative and quantitative analysis?

Answer 4

True

Question 5

True or False:
Spectroscopy can be used the analysis of organic and inorganic compounds?

Answer 5

True

Question 6

True or False:
Spectroscopy can be used to identify (elucidate) the molecular structure of molecules?

Answer 6

True

Question 7

What is electromagnetic radiation?

Answer 7

Energy that is transmitted through space which oscillates through the electric and magnetic field

Question 8

True or False:
Oscillations in the electric and magnetic field are perpendicular to each other?

Answer 8

True

Question 9

Describe wavelength, what symbol is used to represent it

Answer 9

Wavelength is the distance between 2 maxima/minimum of a wave
The symbol used to represent it is λ (Lambda)

Question 9

True or False:
Oscillations in the electric and magnetic field are perpendicular to each other BUT are also perpendicular to what other factor?

Answer 9

Direction of propagation

Question 10

Properties of electromagnetic waves? (4)

Answer 10

Wavelength
Frequency
Velocity
Amplitude

Question 11

Which axis does the magnetic field oscillate on?

Answer 11

Z-axis

Question 12

Which axis does the electric field oscillate on?

Answer 12

Y-axis

Question 13

Direct of propagation of a wave follows which axis

Answer 13

X-axis

Question 14

Describe Amplitude, what letter is used to represent it?

Answer 14

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)

Question 15

Describe Frequency, what letter is used to represent it, what unit is used for it?

Answer 15

The number of oscillations of a wave per second
Represented by the letter (v)
Hertz (Hz)

Question 16

Which once of the following is a vector?
Amplitude
Wavelength
Frequency

Answer 16

Amplitude

Question 17

Frequency is [blank] proportional to Wavelength?
[A] Directly
[B] Inversely

Answer 17

[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)

Question 18

What is the speed of light? What letter is used to represent it?

Answer 18

3x10^8
(c) is used to represent it