Podcast
Questions and Answers
What does a salt bridge primarily allow to pass between the two half-cells?
What does a salt bridge primarily allow to pass between the two half-cells?
- Electrons only
- Ions only (correct)
- Metals only
- Gases only
What is a crucial function of the salt bridge in a voltaic cell?
What is a crucial function of the salt bridge in a voltaic cell?
- It completes the electrical circuit (correct)
- It generates electricity directly
- It prevents the complete dissipation of heat
- It maintains liquid levels in the half-cells
Which materials are commonly used to fill a salt bridge?
Which materials are commonly used to fill a salt bridge?
- Calcium carbonate (CaCO3)
- Potassium chloride (KCl) or potassium nitrate (NaNO3) (correct)
- Magnesium hydroxide (Mg(OH)2)
- Sodium sulfate (Na2SO4)
What prevents the draining or siphoning of liquid from one half-cell to another in a voltaic cell?
What prevents the draining or siphoning of liquid from one half-cell to another in a voltaic cell?
What potential does the salt bridge help to prevent in a voltaic cell?
What potential does the salt bridge help to prevent in a voltaic cell?
Study Notes
Salt Bridge
- A salt bridge is a tube filled with a saturated solution of potassium chloride (KCl) or potassium nitrate (KNO3) thickened with gelatin.
- The ends of the salt bridge are fitted with porous plugs or discs.
- Connects the two half-cells of an electrochemical cell.
- Allows the passage of ions between the two half-cells but prevents the draining or siphoning of liquid from one cell to the other.
- Necessary for the voltaic cell to function as it completes the circuit.
- Prevents liquid junction potential.
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Description
Explore the important role of salt bridges in electrochemical cells. This quiz covers the function, design, and significance of salt bridges in maintaining circuit integrity and facilitating ion transfer between half-cells. Test your knowledge on how these components contribute to the efficiency of voltaic cells.
