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What is yield?
The yield of a product is the amount mass of it produced in a reaction
What is theoretical yield?
the maximum mass it is possible to make from a given mass of reactants
Law of Conservation of Mass
mass cannot be created or destroyed, only transferred
What is actual yield
the mass of the product that is actually made in a reaction, usually less than theoretical yield
What is percentage yield
the percentage of the theoretical yield that is the actual yield
Percentage yield formula
percentage yield = actual yield/theoretical yield x 100
Reasons why percentage yield may be less than 100%?
-Reactants may react in a different way than expected
-Reaction may not go to completion, not all reactants may react
-raw materials may not be pure
some of the product may be lost when separated from the mixture
What is atom economy?
A measure of how many reactant atoms form a desired product
atom economy formula
Atom economy = Mr of Desired Product / Mr of All Products x 100
What is Avogadro's constant?
6.02 x 10^23 /mol, is equal to the number of atoms in 1 mole.
Formula triangle for mass moles Mr
Convert cm^3 into dm^3
cm^3/1000 = dm^3
To calculate concentration
volume of 1 mole of gas at RTP
24dm^3
formula triangle for moles of gas
