Percent Yield Worksheet
Percent Yield Problems
Theoretical Yield = The maximum amount of product that can be formed from given reactants.
--Theoretical yield is the answer from the stoichiometry calculation = maximum possible amount
---Number based upon the “theoretical” mathematical equation – no experiments were conducted.
Actual Yield = The amount of product that actually forms when the reaction is carried out in the lab.
--Due to a variety of factors, the actual amount will ALWAYS be less than the theoretical yield.
---In real life, we never get as much as we anticipate, this “actual” amount from the lab experiment.
Percent Yield = The ratio of the actual yield to the theoretical yield expressed as a percentage.
EXAMPLE) How many grams of hydrofluoric acid (HF) are required to react completely with 23.68 grams of calcium hydroxide in the following reaction?
_1_ Ca(OH)2 + __2_ HF ( __1_ CaF2 + __2_H2O
1 mol Ca(OH)2 2 mol HF 20.01 g HF
23.68 g Ca(OH)2 x ------------------ x ----------------- x ------------------ = 12.79 g HF
74.10 g Ca(OH)2 1 mol Ca(OH)2 1 mol HF
Based on the stoichiometry of this problem, the Theoretical Yield for this problem is 12.79 g HF. But, when this experiment was conducted, an Actual Yield of only 10.41 g HF was collected. Using the equation for percent yield, the Percent Yield of this experiment was 81.39%.
1) A student adds 200.0g of C7H6O3 to an excess of C4H6O3, this produces C9H8O4 and C2H4O2. Calculate the percent yield if 231 g of aspirin (C9H8O4) is produced in an experiment.
___C7H6O3 + ___C4H6O3 ( ___C9H8O4 + ___C2H4O2
2) According to the following equation, Calculate the percentage yield if 550.0 g of toluene (C7H8 )added to an excess of nitric acid (HNO3) provides 305 g of the p-nitrotoluene (C7H7NO2 ) product in a lab experiment.
___C7H8 + ___HNO3 ⋄ ___C7H7NO2 + ___H2O
3 Aluminum reacts with an aqueous solution containing excess copper (II) sulfate. If 1.85 g Al reacts and the percentage yield of Cu is 56.6%, what mass of Cu is produced?
___Al + ___CuSO4 ⋄ ___Cu + ___Al2(SO4)3
4) The combustion of methane(CH4) produces carbon dioxide and water. Assume that 2.0 mol of CH4 burned in the presence of excess air. What is the percentage yield if in an experiment the reaction produces 87.0 g of CO2?
5) 15.3 grams of Lithium is dropped into a solution containing excess copper II phosphate. When the reaction is completed, 1.25 grams of copper is formed. What is the percent yield?
-----------------------
Actual ,
Theoretical
Per
(/6QrÐÑÔë
- . / 0 < Z b • – ˜ ö ÷ óçÝÒʼ´Ê§?“?|j?§Ê\ʼÊQIÊQ
hNaÅOJQJh€*óh€*óOJQJh€*óh€*ó5?>*[pic]OJQJ#h~”CJOJQJeh[pic]rÊÿ[pic],h~”h€*ó5?CJOJQJeh[pic]rÊÿ[pic]hNaÅCJOJQJh€*óCJOJQJh€*óh€*óCJOJQJ
hK@×OJQJh€*óh€*ó5?6?OJQJ
h€*óOJQJh€*ó5?>*[pic]OJQJh@Rëcent Yield = x 100
Percent Yield = x 100 =
Actual ,
Theoretical
x 100 = 81.39%
10.41g HF ,
12.79g HF
................
................
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
- genetics practice problems
- percent yield worksheet
- percent composition worksheet
- percent applications worksheet
- using ratios proportions and percents activity
- worksheet 12 percentage yield calculations
- exercises mass percent chemistry geek
- population worksheet 1
- rule of nines math activity
- solving percent problems using weebly
Related searches
- percent yield worksheet with answers
- percent yield calculations worksheet answers
- percent yield problems worksheet answers
- percent yield worksheet answer key
- worksheet percent yield answer key
- percent yield calculations worksheet ans
- percent yield chemistry worksheet answers
- chemistry percent yield worksheet answers
- percent yield worksheet key
- 18.2 percent yield worksheet answers
- stoichiometry percent yield worksheet answers
- percent yield worksheet pdf