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Simply because you can't make something out of nothing. If the yield is 100%, all your starting substances have been converted to the desired products. Where would you get the atoms for any more? If a yield is more than 100%, something has gone wrong with the experiment or the calculation. One frequent cause of anomaly is the weighing of a product which is wet.

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Which is usually higher the actual yield or the theoreyical yield?

Theoretical yield is typically higher than actual yield because it represents the maximum amount of product that can be obtained in a perfect reaction. Actual yield is the amount of product obtained when the reaction is performed in reality, which may be lower due to factors like incomplete reactions or impurities.


Formula for percent yield in chemistry?

Percentage yield is worked out as (amount you got/ amount you could have got) x 100 You should do the calculation in moles so weigh your compound, work out its molar mass and divide the mass by the molar mass to get number of moles. Then you have to work out your maximum theoretical yield - work out how many moles of reactant you started with and check the stoichiometric ratio from your balanced equation to find how many moles you expected to get. In organic reactions a yield of 60% or so is normal. The more steps you went through in your preparation, the lower you would expect your yield to be. Many reactions just do give a low yield anyway, because they are at equilibrium rather than going to completion, like the Haber process.


Which has a higher freezing point a 20 percent salt solution or pure water?

Pure water has a higher freezing point than 20% salt water.


What is the difference between the predicted and actual yield in a chemical reaction?

The actual yield of a reaction product is always less than the yield from the chemical equation. This is because of error.


What is experimental yield?

The expected percent yield is how much product you expect to get for a given experiment. This isn't necessarily theoretical yield, however. Theoretical yield is the amount of product you will get considering that NONE is lost, and the product goes 100% to completion (this omits the equilibriums that occur, i.e. you dont consider the stuff you wont get back, you just assume you'll get all your product) Expected yield is how much product you expect to get. If someone has invented or done the experiment before and says you will get a 56% yield if you follow steps a,b,c,d etc etc, then your expected yield is 56%.

Related Questions

What sources of experimental error lead to a percent yield higher than 100 percent?

The reaction may have not been complete yet, therefore resulting in a higher percent yield than 100%


Why would your percent yield be higher than 100 percent?

impure products or inaccurate calculations is usually the reason


Why percent yield is more than 100?

Percent yield greater than 100% can occur due to impurities in the final product, incomplete reactions, or errors in the measurements taken during the experiment. It is a sign that not all of the reactants were converted to the desired product, leading to a higher yield than theoretically expected.


Can 120 percent be a probabilty?

No. No percentage higher than 100 percent is possible. Out of 100 occurrences it is impossible to obtain an answer of more than the totality of the occurrences.


Typical commission for IT Hardware sales?

The typical commission for IT hardware sales depend on the cost of hardware sold. Hardware costing below $10,000 will yield 8 percent commission, $10,001 - $20,000 is equivalent to 10 percent commission, and higher than $20,000 will yield 13 percent commission.


Is 0.3 percent higher than 15 percent?

No, it is not.


What is the average yield off of one marijuana plant?

Higher than you think


Which is usually higher the actual yield or the theoreyical yield?

Theoretical yield is typically higher than actual yield because it represents the maximum amount of product that can be obtained in a perfect reaction. Actual yield is the amount of product obtained when the reaction is performed in reality, which may be lower due to factors like incomplete reactions or impurities.


Why could an actual yield be more than a theoretical yield?

An actual yield can be more than a theoretical yield due to incomplete reaction conversion, impurities in reactants, or unexpected side reactions. These factors can result in more product being formed than predicted by theoretical calculations.


Colemans preferred stock is riskier to investors than its debt yet the yield to investors is lower than the yield to maturity on the debt Does this suggest that you have made a mistake?

Corporate investors own most preferred stock, because 70 percent of preferred dividends received by corporations are nontaxable. Therefore, preferred often has a lower before-tax yield than the before-tax yield on debt issued by the same company. Note, though, that the after-tax yield to a corporate investor and the after-tax cost to the issuer are higher on preferred stock than on debt.


Is a blood alcohol content of 0.11 percent higher than one of .16 percent?

no the higher the content the higher the number ..breath or blood


How do you obtain percent yield of a reaction?

the amount of product obtained over the amount possible multiplied by 100