Chemistry GCSE
Excess reactant
What Excess reactant means in Chemistry GCSE, as defined for AQA.
Definition of Excess reactant
Check what you remember
Read the wording for your board, then hide it and explain Excess reactant in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
The reactant that is not fully used up and some of which remains unreacted after the reaction.
Topics that use Excess reactant
- Limiting reactants (HT only) (AQA GCSE)
Related terms
Using Excess 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 GCSE termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge