Thursday, March 6, 2008

WHY

Why do we need to find the limiting and excess reactants and how do they differ from the actual and theoretical yields?

15 comments:

Reeber said...

We limiting reactants to find out how much is in a product. The excess reactant is what you have left form the limiting reactant. Without them, chemical equations would be almost impossible.

BiG Goehring said...

We need limiting reactants for determining the amount of a product. So with the excess reactant we know if the reactant remains after the chemical reaction stops. Also without both we won't be able to to work on chemical equations. Actual yield is the amount of product actually roduced when a chemical reaction is carried out in an experiment. With theoretical yield is the maxium amount of produt that can be produced from a given amount of reactant.

aaron peterson said...

The limiting reactant is important to tell us the amount of product we will have. The excess helps us deterine what will not be used. You use the limiting reactant to determine the actual product. Then you use the theortical and actual product to find the percent yield.

junger said...

It helps buisnesses to be more efficient and make them have more profit and earn the most money. Actual is what actually comes out. Theoretical is what should come out if you are correct.

Richard said...

We need to find the limiting and excess reactants so that we can find the actual and theoretical yeilds. the limiting is used to find the actual yeild, and the excess is the leftover not used. the actual yeild is the amount of product actually reproduced. the theoreticall is what it shoudl be to be the most eficcent.

streckfuss said...

We need limiting reactants for determining the amount of a product. So that is why we need to know the different types of reactants. We need to find these for the percent yield.

tara said...

We need to find the limiting reactant because that is the only amount that we have left in a product. The excess is how much that we have left. If we didn't find them the equation wouldn't work out.

karlen said...

You need limiting reactants so that way you can determine that amount of a product. With out these we couldnt work on chemical equations. With theoretical yield is the amximum amount of any type of product that coud be produced.

Mindy said...

We need to determine limiting and excess to find out the amount of a product. This is also called the actual. Then, to find the percent yield, you use the theoretical and actual.

Kelsey M. said...

We need to know what we are going to have enough and what we need more of. The actual yield is the exact number of how much you have. Your theoretical yield is a ratio to the actual yield.

tyler haaland said...

We need to find them because we need to find what is in a product and how much of it. Actual Yield and Theoretical yeilds arent liek the numbers in the equation. You find them from the numbers though.

Rylee said...

it helps to know our limiting and excess reactants very much. The limiting reactant shows you how much is in a product. The excess reactant shows what is left over from the product.

Taylor S. Armstrong said...

We need limiting reactants to find out how much is in a product. The exces reactant is what you have left over from the limiting reactants. Without them, we would never ever beable to make chemical equation

Anonymous said...

We need to know what's what in order to figure out how to set up the reaction. If we know what is left over, we know how much we need to get to that left over amount. It really just helps people know what kinds of numbers they will be dealing with.

jacob ochsner said...

We need to know it to set up our equation. It is helpful. We need them to get the awnser. Hooray i remebered to blog!!!!!