Chemistry A-Level
salt bridge
What salt bridge means in Chemistry A-Level, as defined for AQA.
Definitions of salt bridge
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Reference: AQA
Usually saturated KNO₃, it completes the circuit by letting ions move between the two solutions and keeps each electrically neutral; it does not carry electrons.
Usually filter paper soaked in saturated potassium nitrate, joining the two solutions and completing the circuit by letting ions move between the half-cells.
Topics that use salt bridge
- Electrode potentials and cells (A-level only) (AQA A-Level)
Related terms
- cell diagrams
- charge balance
- combining half-equations
- effect of concentration
- feasibility
- feasibility prediction
- high-resistance voltmeter
- oxidising agent strength
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