Chemistry A-Level
Kc and Kp conventions
What Kc and Kp conventions means in Chemistry A-Level, as defined for OCR.
Definition of Kc and Kp conventions
Check what you remember
Read the wording for your board, then hide it and explain Kc and Kp conventions in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Kc uses equilibrium concentrations in mol dm⁻³, while Kp uses equilibrium partial pressures in Pa, keeping the two conventions distinct.
Topics that use Kc and Kp conventions
- How far? (OCR A-Level)
Related terms
- Constant temperature and constant titre
- Conversion between moles, concentration and partial pressure
- Determination of units by unit cancellation
- Effect of temperature on equilibrium position
- Equilibrium constant
- Equilibrium constant expressions for Kc and Kp
- Equilibrium constant Kc
- Equilibrium expressions from balanced equations
Using Kc and Kp conventions 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.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge