Electrochemistry remediation

Electrochemistry remediation

By Lynsey Williams

Vocabulary

Multiple Choice

What is reduction?

• It is the gain of electrons.

• It is the loss of electrons.

• It is the creation of electrons.

• It is the destruction of electrons.

Multiple Choice

What is oxidation?

• It is the gain of electrons.

• It is the loss of electrons.

• It is the creation of electrons.

• It is the destruction of electrons.

Multiple Choice

What is a galvanic (voltaic) cell?

• It is a cell that destroys electrons on one side and creates electrons on the other side.

• It is a cell that contains only one metal bar and one aqueous ion solution.

• It is a type of battery that drives a redox reaction when electricity is applied.

• It is a type of battery that generates an electrical current from redox reactions.

Multiple Choice

What is an anode?

• It is the electrode where oxidation takes place.

• It is the electrode where reduction takes place.

• It is an aqueous solution containing an electrode.

• It is the salt bridge that connects half-cells.

Multiple Choice

What is a cathode?

• It is the electrode where oxidation takes place.

• It is the electrode where reduction takes place.

• It is an aqueous solution containing an electrode.

• It is the salt bridge that connects half-cells.

Multiple Choice

What is the function of Y in cell below?

• To complete the circuit
• To allow flow of electrons between both cells
• To allow flow of ions 
• To connect both half cells

Multiple Choice

What is the oxidation number of Fe in FeO?

• +1
• -1
• +2
• -2

Multiple Choice

What is the oxidation number of O in CO₂?

• +2
• -1
• +4
• -2

Multiple Choice

What is the oxidation of C in CH₄?

• -4
• -1
• +4
• +1

Multiple Choice

What is oxidation number of P in K₃PO₄?

• +1
• +5
• -2
• 0

Multiple Choice

As an element is oxidized, its oxidation number

• decreases as electrons are lost

• increases as electrons are lost

• decreases as electrons are gained

• increases as electrons are gained

Multiple Choice

Mg + PbCl₂ → MgCl₂ + Pb

Which statement correctly describes the oxidation and reduction that occur?

• Mg is oxidized and Pb⁺² is reduced

• Mg is oxidized and Cl^- is reduced

• Mg is reduced and Cl^- is oxidized

• Mg is reduced and Pb⁺² is oxidized

The element higher on the list is stronger and is ​therefore oxidized.

​Stronger Element is oxidized

Using oxidation table

Some text here about the topic of discussion

Multiple Choice

If Al is above Co in the activity series of metals, what is true?

• no reaction

• both elements are reduced

• Al is reduced

• Al is oxidized

Multiple Choice

Look at the metal activity table (4.5) Who is oxidized?

• Cu

• Zn

• CuSO4

• ZnSO4

Multiple Choice

In which direction does electricity flow in a voltaic cell (battery)?

• Electrons flow from the cathode to the anode
• Electrons flow from left to right
• Electrons flow from anode to cathode
• Electrons flow from right to left

Electromagnetic Spectrum

​Some text here about the topic of discussion.

Multiple Choice

A certain photon of light has a wavelength of 4.22x10^-7nm. What is the frequency? (v=c/λ)

• 7.11x10¹⁴ Hz
• 7.11Hz
• 1.41x10^-15
• -1.41x10¹⁵

Multiple Choice

A wave with a large wavelength will have a ______ frequency and _____ energy

• high, low
• high, high
• low, high
• low, low

Multiple Choice

Select the correct order of waves on the EMS 

• Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
• Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
• Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
• Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma

Multiple Choice

As the frequency of an electromagnetic wave increases, the amount of energy in that wave...

• increases.
• decreases.
• stays the same.

Multiple Choice

What is the energy of a quantum of light with a frequency of 7.39x10¹⁴Hz.(E=Hv)

• 4.88x10¹⁹
• 4.88x10^-19
• 2.22x10²³
• 2.22x10^-23

Multiple Choice

Certain blue lights have a frequencey of 6.91x10¹⁴Hz. What is the wavelength? (λ=c/v)

• 4.34x10²¹
• 4.34x10^-21
• 4.34x10^-7
• 2.07x10²³

Multiple Choice

What is the wavelength for a quantum of light with energy of 7.56x10^-19J? (λ=hc/E) 

• 2.62x10^-7m
• 2.62x10⁷m
• 2.64x10^-45m
• 2.64x10⁴⁵m

Multiple Choice

Light is a form of energy.

• True

• False

Multiple Choice

How do we see an object?

• Light reflects off the object and into our eyes.

• Light travels from our eyes and reflects off the object

• Light reflects off our eyes and enters the object

• The object produces its own light