General Knowledge
In which part of a chemical reaction do reagents appear?
The product.
What is a limiting reagent?
The reagent that is completely used up or reacted.
What is an excess reagent?
Reactants that are not used up when the reaction is finished
What is the theoretical yield?
The maximum amount of product that could be formed from given amounts of reactants.
What happens when there isn't enough of one reactant in a chemical reaction?
The reaction stops abruptly.
What is one way of finding the limiting reagant?
By calculating the amount of product that can be formed by each reactant
Why are these products called Limiting Reagents?
Because its quantity limits the amount of products formed
What is the actual yield?
The amount of product that actually forms when the reaction is carried out in the laboratory
What needs to happen to figure out the amount of product produced?
We must determine which reactant will limit the chemical reaction and which reactant is in excess.
Which product in a reaction is the limiting reagent?
The one that produces less product is the limiting reagent
True or false: Chemical reactions with stoichiometric amounts of reactants have no limiting or excess reagents.
True
You need to make sure that an equation is ______ before finding the theoretical and actual yield.
balanced
Why are excess and limiting reagents important?
They let us know when the reaction cannot proceed and limits it from continuing.
Find the limiting reagent by looking at the number of _______ of each reactant.
moles
In the equation 2Na(s)+Cl2(g)→2NaCl(s), how many moles of Cl2 gas do you need to know that some will remain as excess and limiting reagents?
3 moles
To find the theoretical yield, you need to find the _____ _____ between the _____ and the _____.
mole, ratio, reactant, product
Chemical reaction equations give the ideal stoichiometric relationship among ______ and ______.
reactants, products
What is the first step that needs to be completed in order to find the limiting reagent in a chemical reaction?
Balance the equation.
Because of its presence in _____ ______, it is referred to as the excess reagent.
excess amount
What two things do you need to multiply in order to find the actual yield?
percentage and theoretical yield