Percent Yield is the calculation of the amount of product produced to the amount of product one expected.
FORMULA
grams of actual product recovered
Percent Yield= ----------------------------------------------- x 100%
grams of product expected from stoichiometry
On the other hand, Percent Purity is the percentage of the mass of a substance to the mass of the impure substance. This means there are usually some impure substances in a chemical reaction. But we need to calculate the amount of impure substance in an equation for example.
FORMULA:
mass of Pure Substance
% purity=----------------------------- x 100%
mass of Impure Substance
For example,
>If a 156.0 g of Cu ore contains 60.00 g of pure Cu metal. What is the percent purity?
60.00g of Cu
% purity=------------------ x 100% = 38.46 %
156.0g of Cu ore
>There are 6.5 grams of impure Zn, the percent purity is 87%, what is the mass of the pure Zn?
x
87%= -----------------------
6.5 g of Impure Zn
so x= 0.87 * 6.5g Impure Zn
x= 5.6g of pure Zn
FORMULA
grams of actual product recovered
Percent Yield= ----------------------------------------------- x 100%
grams of product expected from stoichiometry
On the other hand, Percent Purity is the percentage of the mass of a substance to the mass of the impure substance. This means there are usually some impure substances in a chemical reaction. But we need to calculate the amount of impure substance in an equation for example.
FORMULA:
mass of Pure Substance
% purity=----------------------------- x 100%
mass of Impure Substance
For example,
>If a 156.0 g of Cu ore contains 60.00 g of pure Cu metal. What is the percent purity?
60.00g of Cu
% purity=------------------ x 100% = 38.46 %
156.0g of Cu ore
>There are 6.5 grams of impure Zn, the percent purity is 87%, what is the mass of the pure Zn?
x
87%= -----------------------
6.5 g of Impure Zn
so x= 0.87 * 6.5g Impure Zn
x= 5.6g of pure Zn
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