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Junction Potential definitions

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  • Junction Potential
    Voltage developed at the interface of two ionic solutions due to differences in ion mobility and concentration.
  • Salt Bridge
    Device in electrochemical cells that allows ion flow to maintain charge balance and complete the circuit.
  • Ion Mobility
    Measure of how quickly an ion moves through a solution, influenced by its size and charge.
  • Semi-Permeable Membrane
    Barrier that allows selective passage of ions, enabling concentration-driven movement between solutions.
  • Electrochemical Cell
    System where chemical energy is converted to electrical energy via redox reactions and ion movement.
  • Cell Potential
    Overall voltage difference between the cathode and anode, affected by junction potential.
  • Potassium Chloride
    Preferred salt for bridges due to similar mobility of its ions, minimizing unwanted voltage build-up.
  • Hydrogen Ion
    Small, highly mobile cation that moves rapidly across membranes, influencing charge distribution.
  • Bromide Ion
    Larger, slower-moving anion that lags behind smaller cations, contributing to charge separation.
  • Concentration Gradient
    Difference in ion concentration across a membrane, driving ion movement and potential formation.
  • Reference Electrode
    Stable electrode used as a comparison point for measuring cell or junction potentials.
  • Indicator Electrode
    Electrode that responds to changes in analyte concentration, used in potential measurements.
  • Charge Accumulation
    Build-up of positive or negative ions on one side of a membrane, leading to a potential difference.
  • Voltage Build-Up
    Development of electrical potential due to unequal ion movement across an interface.
  • Galvanic Cell
    Type of electrochemical cell where spontaneous redox reactions generate electrical energy.