Limiting Reactants (AQA GCSE Chemistry Combined Science): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
What is a limiting reactant?
What is a limiting reactant?
The substance used up first, limiting the amount of product that can be formed
Effect when limiting reactant used up
Effect when limiting reactant used up
Reaction stops, even if other reactants remain
Moles of CuO from 7.95 g (Mr=79.5)
Moles of CuO from 7.95 g (Mr=79.5)
moles
Moles of C from 7.2 g (Ar=12)
Moles of C from 7.2 g (Ar=12)
moles
CuO:C mole ratio in equation
CuO:C mole ratio in equation
2:1
Limiting reactant: 0.1 mol CuO, 0.6 mol C (2:1 ratio)
Limiting reactant: 0.1 mol CuO, 0.6 mol C (2:1 ratio)
CuO (only needs 0.05 mol C)
Moles Cu produced from 0.1 mol CuO
Moles Cu produced from 0.1 mol CuO
0.1 moles
Mass Cu from 0.1 mol CuO (Ar Cu=63.5)
Mass Cu from 0.1 mol CuO (Ar Cu=63.5)
g
Moles CO₂ from 0.1 mol CuO
Moles CO₂ from 0.1 mol CuO
0.05 moles
Mass CO₂ from 0.05 mol (Mr CO₂=44)
Mass CO₂ from 0.05 mol (Mr CO₂=44)
g