Yield and Atom economy

What is the theoretical yield?

The maximum mass that can be made

What is the percentage yield?

Tells us the practical efficiency of producing a product

How can product be lost?

Left behind when products are transferred

Left behind on filter paper

Evaporation

How do you work out percentage yield?

(Mass of product obtained/theoretical yield)X100

What is atom economy?

A measure of the proportion of reactant atoms that become the desired product

What are the economical problem associated with low atom economy reactions?

Produce high amounts of waste

Costs money to buy reactant and a high proportion of the products can’t be sold

Costs money to dispose of waste

What are the environmental problems associated with a low atom economy?

Raw materials are finite

Waste is disposed of in the environment which can be harmful

How do you work out atom economy?

(formula mass of desired products/ formula mass of reactants)X100