Chemistry A-Level
double arrow notation
What double arrow notation means in Chemistry A-Level, as defined for AQA.
Definition of double arrow notation
Check what you remember
Read the wording for your board, then hide it and explain double arrow notation in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The way the equation for a reversible reaction is written, showing that the reaction can proceed in both directions.
Topics that use double arrow notation
- Chemical equilibria and Le Chatelier's principle (AQA A-Level)
Related terms
- closed system
- compromise pressure
- compromise temperature
- constant concentrations
- dynamic equilibrium
- equal effect on both directions
- equal forward and reverse rates
- Equilibrium constant Kc
Using double arrow notation in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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