Chemistry A-Level
Limiting reactant
What Limiting reactant means in Chemistry A-Level, as defined for OCR.
Definition of Limiting reactant
Check what you remember
Read the wording for your board, then hide it and explain Limiting reactant in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The reactant that must be identified first, since the theoretical yield depends on it.
Topics that use Limiting reactant
- Amount of substance (OCR A-Level)
Related terms
- amount of substance
- atom economy
- Atom economy and by-products
- Concentration in mol dm⁻³
- Converting between cm³ and dm³
- Converting between moles and number of particles
- Empirical formula
- Empirical formula mass and molecular formula multiplier
Using Limiting reactant 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