Further Calculations

Question 1

What is the equation for percentage yield?

Answer 1

% yield = ( actual yield / theoretical yield ) x 100%

Question 2

What are some of the reasons why the actual yield is always less than the theoretical yield?

Answer 2

Reaction may be reversible.
Some of product may be lost when separated from reaction mixture.
Some of reactants may react in other reactions.

Question 3

What is the theoretical yield?

Answer 3

Maximum mass of product expected from reaction.

Question 4

What is the actual yield?

Answer 4

Mass of product actually obtained from reaction.

Question 5

What is the equation for atom economy?

Answer 5

Atom economy = ( mass of atoms in desired product / mass of atoms in all products ) x 100%

Question 6

What is the difference between atom economy and percentage yield?

Answer 6

Atom economy is proportion of mass of all products that is desired product.
Percentage yield shows how much of product was actually made compared to expected amount.