Percent Yield Percent Yield is the ratio of the actual yield to the theoretical yield. Percent Yield is the ratio of the actual yield to the theoretical.

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Presentation transcript:

Percent Yield Percent Yield is the ratio of the actual yield to the theoretical yield. Percent Yield is the ratio of the actual yield to the theoretical yield. Actual Yield is the actual amount of a product that is produced in a reaction, usually as measured on a scale. Actual Yield is the actual amount of a product that is produced in a reaction, usually as measured on a scale. Theoretical Yield is the amount of a product that should be produced according to stoichiometric calclulations. Theoretical Yield is the amount of a product that should be produced according to stoichiometric calclulations.

Percent Yield Example #1 CaCO 3 → CaO + CO 2 If 24.8 g of CaCO 3 decomposes and produces 13.1 g of CaO. What is the percent yield of CaO? If 24.8 g of CaCO 3 decomposes and produces 13.1 g of CaO. What is the percent yield of CaO? 1. Identify the actual yield: 2. Calculate the theoretical yield: To calculate the theoretical yield, we need to calculate how much CaO should be produced from 24.8 g CaCO 3. To calculate the theoretical yield, we need to calculate how much CaO should be produced from 24.8 g CaCO g of Ca

Percent Yield Example #1 Continue Calculation of Theoretical Yield Calculation of Theoretical Yield 24.8 g CaCO 3 xxx 1 mol CaCO g CaCO 3 1 mol CaO g CaO Theoretical Yield = g CaO

Percent Yield Example #1 Continue Calculation of Percent Yield Calculation of Percent Yield % Yield = Actual Yield Theoretical Yield X 100 % Yield = 13.1 g of CaO g CaO X 100 % Yield = % Yield

Percent Yield Example #2 Al(OH) 3 + 3HCl → AlCl 3 + 3H 2 O Al(OH) 3 + 3HCl → AlCl 3 + 3H 2 O If 14.0 g of Al(OH) 3 is present in an antacid tablet, determine the theoretical yield of AlCl 3 produced when the tablet reacts with HCl. If the actual yield of aluminum chloride is 22.0 g, what is the percent yield? If 14.0 g of Al(OH) 3 is present in an antacid tablet, determine the theoretical yield of AlCl 3 produced when the tablet reacts with HCl. If the actual yield of aluminum chloride is 22.0 g, what is the percent yield?

Percent Yield Example #3 Cu + 2AgNO 3 → 2Ag + Cu(NO 3 ) 2 When Cu is placed into a AgNO 3 solution, Ag crystals and Cu(NO 3 ) 2 form. If a 20.0 g sample of Cu is used, determine the theoretical yield of Ag. If 60.0 g of Ag is actually recovered from the reaction, determine the percent yield. When Cu is placed into a AgNO 3 solution, Ag crystals and Cu(NO 3 ) 2 form. If a 20.0 g sample of Cu is used, determine the theoretical yield of Ag. If 60.0 g of Ag is actually recovered from the reaction, determine the percent yield.