Reaction yields (AQA GCSE Chemistry): Flashcards

📚Flashcards
Reaction yields
Sign up to keep revising.Create a free account to study more flashcards and track your progress.

Practise the cards

12 cards from this deck

Show

What is yield?

Amount of product obtained from a reaction

What is theoretical yield?

Maximum possible product from starting reactants

Atom conservation in reactions

No atoms are gained or lost

What is actual yield?

What you actually get from the experiment

How does actual compare to theoretical yield?

Actual is nearly always less than theoretical

Lower yield reason: reversible reaction

Some product changes back into reactants

Lower yield reason: incomplete reaction

Some reactants left unreacted

Lower yield reason: side reactions

Reactants make other unwanted products

Lower yield reason: product loss

Product lost when separating from mixture

Percentage yield formula

ActualTheoretical×100\frac{\text{Actual}}{\text{Theoretical}} \times 100

0% percentage yield means

No expected product was made

100% percentage yield means

All expected product was made (perfect result)

Explore AQA GCSE Chemistry Revision Notes by Topics

Explore AQA GCSE Chemistry Model Answers by Topics

Explore AQA GCSE Chemistry Exam Questions by Topics

Join 100,000+ GCSE students studying Flashcards with us.

Select your subjects, and get access to A+ resources today.