What is the role of a salt bridge in an electrochemical cell?

Practice Questions

Q1
What is the role of a salt bridge in an electrochemical cell?
  1. To connect the two electrodes
  2. To maintain charge balance
  3. To increase conductivity
  4. To provide a source of ions

Questions & Step-by-Step Solutions

What is the role of a salt bridge in an electrochemical cell?
  • Step 1: Understand that an electrochemical cell has two parts called half-cells.
  • Step 2: Know that each half-cell has a different charge due to chemical reactions.
  • Step 3: Realize that if one half-cell becomes too positive or too negative, it can stop the reaction.
  • Step 4: Learn that a salt bridge is a tube filled with a salt solution that connects the two half-cells.
  • Step 5: Understand that the salt bridge allows ions to move between the half-cells.
  • Step 6: Recognize that this movement of ions helps balance the charges in both half-cells.
  • Step 7: Conclude that the salt bridge is important for keeping the electrochemical cell working properly.
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