Percentage Yield
Theoretical Yield
Excess Reactants
Limiting Reactant
Joshua questions
100
How do you find the percentage Yield?
divide the theoretical yield by the actual yield
100
what is theoretical yield?
This is the amount of product you calculated before the reaction
100
what is an excess reactant
the reactant that is still left over after the reaction
100
what is the limiting reactant
this is the reactant that is used completely in the reaction
100
Who's Joshua's presumed mother?
Ms. Kelly
200
1CaF2 + 1H2SO4 --> 1CaSO4 + 2HF
In one process 4.25kg of CaF2 are treated with an excess of H2SO4 and yield 1.95kg of HF. Calculate the % yield of HF.
1950g
------------- = 89.5%
2170.125g
200
What is the difference between theoretical yield and actual yield?
Theoretical Yield is what you get from the calculations while actual yield is from the reaction itself
200
what is the difference between excess reactants and limiting reactants?
Excess reactants are what is left over in a reaction while limiting reactants are completely used in the reaction preventing the more products from being created.
200
Why was Joshua angry about getting the chemistry question barely incorrect.
Because he was so ClOSe to the correct answer. Yeah...let that SiNK in...
300
For the balanced equation shown below, if the reaction of 77.0 grams of CaCN2 produces 27.1 grams of NH3, what is the percent yield?
CaCN2+3H2O => CaCO3+2NH3
Percentage yield is 83%
300
20 grams of aluminum react with 44.8 L of oxygen gas (O3). What is the theoretical yield of Al2O3
9.44 g of Al2O3
300
4KO2+2H2O-->4KOH+3O2
Potassium superoxide, KO2, is used in rebreathing masks to generate oxygen according to the reaction below. If the mask Contains 56.88g KO2 and 3,60g water, you should be able to produce 9.6 of O2 gas
300
What's Joshua's Italian mob boss name?
Mr. (Tony) Tortellini
400
For the balanced equation is shown below, if the reaction of 0.112 grams of H2 produces 0.745 grams of H2O, what is the percentage yield?
Fe3O4+4H2 => 3Fe+ 4H2O
Percentage yield is 74.5%
400
CaF2 + H2SO4 --> CaSO4 + 2HF What is the theoretical amount of HF?
2178.125g HF
400
How much NH3 is left unreacted if 1.0 kg if NH3 reacts with 1.0kg of O2 and 1.0kg of CH4 in the following run:
2CH4+3O2+2NH3-->2HCN+6H2O
20.8 HCN was produced
What was the excess reactant and how much is left over?
646g of NH3 that is left over after the reaction
400
Why is Joshua made out of Flourine, Uranium, and Nitrogen?
Because he's so FUN to be around
500
For the balanced equation shown below, if the reaction of 20.7 grams of CaCO3 produces 6.81 grams of CaO, what is the percentage yield?
CaCO3 => CaO+CO2
Percentage yield is 58.7%
500
If 4.50 g of HCl are reacted with 15.00 g of CaCO3 according to the following balanced chemical equation, calculate the theoretical yield of CO2. 2HCl + CaCO3 → CaCl 2 + H2O + CO2
92.3%
500
C4H9OH + NaBr + H2SO4 
C4H9Br + NaHSO4 + H2O If 15.0 g of C4H9OH react with 22.4 g of NaBr and 32.7 g of H2SO4 to yield 17.1 g of C4H9Br, what is the percent yield of this reaction and the excess reactant?
500
What's Joshua's middle name
Richard