Quantitative - Atom Economy And Yield

Question 1

what is atom economy

Answer 1

the percentage of the mass of the reactants that end up as useful products

Question 2

equation for atom economy

Answer 2

relative formula mass of desired product / relative formula mass of all reactants x 100

Question 3

economic advantages of a high atom economy

Answer 3

low atom economy produces more waste

more raw materials are needed so more expensive

Question 4

environmental advantages of a high atom economy

Answer 4

fewer raw materials

less waste which is often harmful and is difficult to dispose of

Question 5

what is theoretical yield

Answer 5

the amount you would get if all the reactants formed the desired products

Question 6

equation for percentage yield

Answer 6

mass of product made/ theoretical yield mass x 100

Question 7

what are 3 reasons why percentage yield is never 100%

Answer 7

reaction may be reversible so will always be reacting to form the reactants

products are lost when its separated from the reactants . for example liquid will be left behind when filtering out a solid

side reactions. Reactants may react with impurities or gasses in the air.

Question 8

describe 5 things needed to be considered when choosing a reaction to use in the industry

Answer 8

atom economy - a high atom economy means there will be less waste products and fewer raw materials needed so cheaper

percentage yield - so less reactants are wasted and more sustainable because less waste will be made

equilibrium position

rate of reaction

usefulness of by products