Redox Review

Which half-reaction correctly represents reduction?

• Ag --> Ag⁺ + e^-

• F₂ --> 2 F^- + 2e^-

• Au³⁺ + 3e^- --> Au

• Fe²⁺ + e^- --> Fe³⁺

Which reaction is an example of an oxidation-reduction reaction?

• AgNO₃ + KI --> AgI + KNO₃

• Cu + 2 AgNO₃ --> Cu(NO₃)₂ + 2 Ag

• 2 KOH + H₂SO₄ -> K₂SO₄ + 2 H₂O

• Ba(OH)2 + 2 HCl --> BaCl2 + 2 H2O

In any redox reaction, the substance that undergoes reduction will

• lose electrons and have a decrease in oxidation number

• lose electrons and have an increase in oxidation number

• gain electrons and have a decrease in oxidation number

• gain electrons and have an increase in oxidation number

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the spaces provided, or a separate sheet of paper, balance the equation using the smallest whole-number coefficients.

• 3, 2, 3, 2

• 1, 3, 2, 1

• 1, 1, 1, 1

• 2, 3, 2, 3

Tags

NGSS.HS-PS1-7

Which component of an electrochemical cell is correctly paired with its function?

• external conductor -- allows the solutions to mix

• external conductor -- permits the migration of ions

• salt bridge -- allows the solutions to mix

• salt bridge -- permits the migration of ions

Tags

NGSS.HS-PS2-5

Which half-reaction occurs at the cathode?

• Combustion

• Oxidation

• Reduction

• All of the above

This is the half reaction for: 
Sn(s) → Sn⁴⁺(aq) + 4e⁻

• redox
• reduction
• oxidation
• neutralization

What is the oxidation number of carbon in NaHCO3?

• +1
• +4
• -4
• +6

What is a 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.

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.