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Theoretical Yield: The maximum amount of product if ALL of the limiting reagent reacted exactly as described by the balanced equation, with no losses due to side reactions or spillage. Percent Yield: The amount of purified product obtained, divided by the theoretical yield.
Cell mass and product formation by microorganisms can be described quantitatively by yield coefficients expressed as the mass of cells or product formed per unit mass of substrate consumed, Yx/, and Yp/, for cells and product, re- spectively.
Percent Yield Calculations Practice Problems 1) A reaction with a·calculated yield of 9.23 g produced 7.89 g of product. What is the percent yield for this reaction? 2) 5.96 g of ammonia (17.031 g/mol) react completely according to the following reaction: 2 NH3(g) + C02(g) What is the theoretical yield of urea (CN20H4 60.056) for this reaction?
The limiting reagent gives the smallest yield of product calculated from the reagents (reactants) available. This smallest yield of product is called the theoretical yield. To find the limiting reagent and theoretical yield, carry out the following procedure: 1. Find the moles of each reactant present. 2.
Percent Yield • Theoretical yield: the maximum amount of product, which is calculated using the balanced equation • Actual yield: the amount of product obtained when the reaction takes place
The actual yield is simply the mass of product obtained (usually expressed in grams). The theoretical yield is the maximum amount of product that could have been obtained if the reaction had been 100% efficient. In order to determine the theoretical yield, one first needs to consider the stoichiometry of the balanced equation for
Explain the concepts of theoretical yield and limiting reactants/reagents. Derive the theoretical yield for a reaction under specified conditions. Calculate the percent yield for a reaction. The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts.
