C2 - Yields Flashcards
What is a Yield?
The amount of useful product formed in a reaction
What is Theoretical Yield?
The maximum amount of a product that could be formed from a given mass of reactants
What are the 3 reasons a reaction may not give 100% yield?
The reaction may be incomplete
Some product could be lost during the practical
There may be unwanted reactions taking place - reactants could be being used up as a result
What is the equation for Percentage Yield from a reaction?
Actual Yield/Theoretical Yield X 100
What are ‘waste products’?
Products that are unnecessary and have no use in the reaction
What is a ‘by product’?
A product that is unwanted or isn’t required
Why is it expensive to get rid of waste chemicals safely?
Because it costs money to transport them and cleanse them safely and effectively
Why don’t people like to live near chemical factories?
Eye sore
Traffic congestion
Noise pollution
Smog
What does a higher percentage yield or lower percentage yield mean in terms of waste products?
A higher percentage yield would result in a lower number of waste products and vice versa
What is a reaction referred to when it has a high percentage yield?
An economically viable method
