Percent Yield and Limiting Reagents - Oak Park Independent
[Pages:12]Percent Yield and Limiting Reagents
February 17, 2015
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
Reasons for Percent Yield
? There are many reasons you might not get the expected amount of product from a reaction
? Sources of error, nature of rxn
? Percent Yield measures how much of the expected product you actually get
? If a package of chocolate chips is supposed to make 48 cookies, but you only make 34 cookies out of it, you didn't get 100% yield
Calculating Percent Yield
? Percent Yield Formula Measure it (given in problem)
percent yield = actual yield x 100 theoretical yield
Use Stoichiometry
Percent Yield Problem #1
? What is the percent yield of this reaction if 24.8 g of CaCO3 is heated to give 13.1 g of CaO?
CaCO3 ? CaO + CO2
? To find out how much product should be made:
? Set the problem up like you would a Mass-Mass Stoichiometry Problem
1. Balance The Equation 2. Convert Grams to Moles 3. Complete Mole Ratio 4. Convert Moles to Grams
? Then find % yield using the formula
Percent Yield Problem #1
? What is the percent yield of this reaction if 24.8 g of CaCO3 is heated to give 13.1 g of CaO? CaCO3 CaO + CO2 1. Balance The Equation: DONE
2. Convert Grams to Moles: 24.8 g CaCO3 = 0.247 Moles CaCO3 100.09 g CaCO3
3. Complete Mole Ratio:
CaCO3 = _1__ = 0.247 M CaCO3 = 0.247 M CaO
CaO 1
x M CaO
4. Convert Moles to Grams
theoretical
0.247 M CaO ? 56.08 g CaO = 13.9 g CaO
Percent Yield Problem #1
? What is the percent yield of this reaction if 24.8 g of CaCO3 is heated to give 13.1 g of CaO? CaCO3 CaO + CO2
13.1 g CaO is the ACTUAL YIELD (it's given in the problem!) 13.9 g CaO is the THEORETICAL YIELD (it's what you just
solved for)
? Now that you found out the theoretical value, plug your answer into the formula
percent yield = actual yield x 100 theoretical yield
percent yield = 13.1 g ? 100 = 94.2 % 13.9 g
Percent Yield Problem #2
? From the previous problem, the theoretical yield was calculated to be 152.6 g CaO. What would the actual yield be?
? Remember you calculated the % yield to be 94.2%
percent yield = actual yield x 100 theoretical yield
94.2% = actual yield ? 100 152.6 g
ACTUAL YIELD = 143.75 g
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- a step by step guide to calculating limiting reagent
- theoretcal yield example
- on percent yields
- about percent yield in the organic laboratory
- usda table of cooking yields for meat and poultry
- percent yield and limiting reagents oak park independent
- limiting reagents theoretical actual and percent
- porosity specific yield capillary rise
- educator lesson plan kitchen calculations
Related searches
- theoretical and percent yield calculator
- theoretical and percent yield problems
- percent yield questions and answers
- percent actual and theoretical yield answ
- theoretical and percent yield worksheet
- practice homework 23 theoretical yield and percent yield calculations
- difference between percent yield and error
- percent yield problem and answer
- percent actual and theoretical yield answers
- theoretical yield and percent yield formula
- percent yield problems and answers
- percent yield and theoretical yield