Percentage Yield / Atom Economy Flashcards
What should you make sure you do before carrying out any calculation?
Balance the equation.
What is the formula for percentage yield?
% yield = (actual mass) / (theoretical mass) x 100
What is the formula for atom economy?
% atom economy = (Mr of desired product) / (Mr of reactants) x 100
What can the percentage yield of a practical be used to investigate?
Efficiency of practical techniques and whether reactions proceed as estimated.
What factors may affect how much product is produced at the end?
Other reactions take place simultaneously.
The reaction does not go to completion.
Reactants or products are lost to the atmosphere.
What can the atom economy of a reaction be used to investigate?
Efficiency of using a specific reaction to produce a product.
(Instead of other reactions that might produce same product)
How can yield be represented?
In grams or moles.
When will the atom economy be 100%?
When there’s only 1 product.
Why is it beneficial to have high atom economy?
Less waste is produced.
More sustainable use of resources.
Saves money. Cheaper.
