CP8 Investigating Electrochemical Cells

• Electrochemical cells convert chemical energy into electrical energy through spontaneous redox reactions.
• Electrodes are conductors where oxidation and reduction occur in electrochemical cells.
• The salt bridge in an electrochemical cell maintains electrical neutrality by allowing ion movement.
• Sequence the flow of electrons and ions during the operation of an electrochemical cell.

  1️⃣ Electrons flow from the anode to the cathode through an external circuit.

  2️⃣ Ions in the salt bridge migrate to balance the charge in the electrolytes.
• The reduction half-reaction in the example is $Cu^{2 + }(aq) +$$2e^ - \rightarrow Cu(s)$.
• The anode in an electrochemical cell is the electrode where oxidation occurs.
• The electrolyte in an electrochemical cell facilitates the flow of ions between the electrodes.
• Match the component of an electrochemical cell with its process.

  Anode ↔️ Oxidation

  Cathode ↔️ Reduction

  Electrolyte ↔️ Ionic conduction
• Arrange the steps in the redox reactions within an electrochemical cell.

  1️⃣ Oxidation occurs at the anode, where atoms lose electrons.

  2️⃣ Reduction occurs at the cathode, where ions gain electrons.

  3️⃣ Electron flow drives the electrical current in the cell.
• An electrochemical cell converts chemical energy into electrical energy through redox reactions.
• What occurs at the anode in an electrochemical cell?

  Oxidation
• The cathode in an electrochemical cell is the site of reduction
• The electrolyte in an electrochemical cell facilitates ion flow.
• What is the primary function of the salt bridge in an electrochemical cell?

  Maintains electrical neutrality
• An electrochemical cell converts chemical energy into electrical energy.
• Steps in the redox reactions in electrochemical cells

  1️⃣ Oxidation occurs at the anode

  2️⃣ Atoms lose electrons during oxidation

  3️⃣ Reduction occurs at the cathode

  4️⃣ Ions gain electrons during reduction
• What do redox reactions drive in an electrochemical cell?

  Electrical current
• Voltaic cells generate electricity through spontaneous redox reactions.
• Electrolytic cells use electricity to drive non-spontaneous redox reactions.
• What is the role of electrodes in electrochemical cells?

  Conduct electrical current
• What is the function of electrolytes in electrochemical cells?

  Facilitates ion movement
• Match the electrochemical series concept with its description:

  Electrode potential ↔️ Measures tendency to lose or gain electrons

  Electrochemical series ↔️ Ranks metals by their electrode potentials
• What does a more negative electrode potential indicate?

  Stronger tendency to oxidize
• What is the standard electrode potential of copper?

  $E° =$$+$$0.34 V$
• A more negative electrode potential indicates a stronger tendency to act as a cathode.

  False
• What is the standard electrode potential of zinc?

  $E° =$$- 0.76 V$
• What occurs at the anode of an electrochemical cell?

  Oxidation
• The cathode is the electrode where reduction occurs.
• The electrolyte in an electrochemical cell facilitates the flow of electrons.

  False
• Match the component with its function in an electrochemical cell:

  Anode ↔️ Oxidation site

  Cathode ↔️ Reduction site

  Electrolyte ↔️ Facilitates ion flow
• In a zinc-copper cell, which electrode is the anode?

  Zinc
• Redox reactions involve the simultaneous processes of oxidation and reduction.
• What drives the electrical current in an electrochemical cell?

  Electron transfer
• Match the process with its location and electron activity in a redox reaction:

  Oxidation ↔️ Anode, electrons lost

  Reduction ↔️ Cathode, electrons gained
• What are the two types of electrochemical cells based on energy conversion?

  Voltaic and electrolytic
• Voltaic cells convert chemical energy into electrical energy.
• Voltaic cells use spontaneous redox reactions to generate electrical current.
• What type of energy is required to drive non-spontaneous redox reactions in electrolytic cells?

  Electrical energy
• In electrochemical cells, electrodes are conductors where oxidation and reduction occur.
• What does the Electrochemical Series rank metals by?

  Electrode potentials