Electrochemistry- Term 1, Year 12

Oxidation is the ______ of electrons

• Loss

• Gain

Which is the correct short-hand notation for a cell?

• Anode Half-cell | Cathode Electrolyte || Anode Electrolyte | Cathode Half-cell

• Anode Half-cell | Anode Electrolyte || Cathode Electrolyte | Cathode Half-cell

• Cathode Half-cell | Cathode Electrolyte || Anode Electrolyte | Anode Half-cell

• Cathode Half-cell || Anode Electrolyte | Cathode Electrolyte || Anode Half-cell

What is cathodic protection?

• Electrons are forced back into the metal to prevent corrosion

• Metals are combined to form an alloy which forms an oxide layer

• Metal is covered in a layer of a non-corrosive metal

Corrosion will occur when two ________ are in contact

• Dissimilar metals

• Similar metals

• Metals

If Cd and Fe reacted, what would the final reaction be, and what would the Ecell value be?
[Cd(2+) + 2e- -> Cd = -0.40V]
[Fe(2+) +2e- -> Fe = -0.45V]

• Fe(2+)(aq) + Cd(s) -> Fe(s) + Cd(2+)(aq) = -0.05V

• Fe(2+)(aq) + Cd(s) -> Fe(s) + Cd(2+)(aq) = +0.05V

• Fe(s) + Cd(2+)(aq) -> Fe(2+)(aq) + Cd(s) = +0.05V

• Fe(s) + Cd(2+)(aq) -> Fe(2+)(aq) + Cd(s) = -0.05V

Why doesn't aluminium (Al) corrode under standard conditions?

• It forms an oxide layer of 2 aluminium atoms and 3 oxygen atoms

• It has a negative oxidation potential and therefore does not corrode spontaneously

• It forms an oxide layer of 1 aluminium atom and 1 oxygen atom

What is the oxidation number of Oxygen in Hydrogen Peroxide?

• -2

• +2

• +1

• -1

What is the oxidation number of Hydrogen in LiH?

• +1

• +2

• -1

• -2

In a galvanic cell, what is an observation made about the cathode?

• The cathode will be corroding

• The cathode will be gaining a deposit

What does a salt bridge do?

• Allows the migration of ions to solutions

• Allows the migration of electrons to solutions

• Allows the migration of atoms to solutions

What is the charge of Phosphorus in the Phosphate ion?

• 5+

• 3+

• 2+

• 3-

What is the charge of Sulfur in the Sulfate ion?

• 6+

• 4+

• 3-

• 5-

What is the charge of Chromium in the Dichromate ion?

• 6+

• 12+

• 3+

• 4-

What is the reducing agent in a redox reaction between zinc and a silver nitrate solution?

• Zinc

• Silver

• Nitrate ions

• Zinc ions

What is the oxidation of iron (II) ions to iron (III) ions by dichromate to Cr (III) ions in acidic solution? (Open in full-screen to view answers properly)

An atom with a high electronegativity will want to be...

• Oxidised

• Reduced