Percentage Yield and Sustainable Development

Question 1

What 3 reasons are there for why a yield can’t be 100%?

Answer 1

1) The reaction is reversible
2) Filtration
3) Unexpected reactions

Question 2

Why does The reaction is reversible mean that there can’t be a 100% yield?

Answer 2

1) the reactants will never be completely converted to products because the reaction goes both ways
2) Some of the products are always reacting together to change back to the original reactants
3) = a lower yield

Question 3

Why does Filtration mean that there can’t be a 100% yield?

Answer 3

When you filter a liquid to remove solid particles, you nearly always lose a bit of the liquid or solid
So, some of the product may be lost when it’s separated from the reaction mixture

Question 4

Why does Unexpected reactions mean that there can’t be a 100% yield?

Answer 4

unexpected reactions use up the reactants. this means there’s not as much reactant to make the product you want

Question 5

What is a reversible reaction?

Answer 5

One where the products of the reaction themselves react to produce the original reactions

Question 6

Product yield is important for [ ] development

Answer 6

sustainable

Question 7

What is sustainable development about? Link to yield

Answer 7

Making sure that we don’t use resources than they can be replaced - there needs to be enough for future generations
For example , using as little energy as possible to create the highest product yield possible means that resources are saved. A low yield means wasted chemicals - not very sustainable