Limiting Reactants

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich.  If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

• bread

• jelly

• peanut butter

• sandwich

What is a limiting reactant?

• the reactant that determines how much product can be made

• the reactant that is in excess

• the product that you can make the most of

• the amount of reactants that react with each other

In this image, what are the information in red is called the_______.

• Product

• Reactant

• Chemical Subscript

• Yield

In this image, what are the information to the right of the arrow (in black) is called the_______.

• Product

• Reactant

• Chemical Subscript

• Yield

What is the arrow in a chemical equation...
H_{2 +} O --> H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

1.Which statement is TRUE about the limiting reagent?

• It is completely used up in a reaction.

• It is the reactant which has the most mass.

• It is always one of the products.

• It is the substance which is in excess.

If the quantity of B is insufficient to react with all of A in the reaction A + B → C + D, which of the following statements is TRUE?

• A is the limiting reactant.

• B is the limiting reactant.

• No product can be formed.

• There is no limiting reactant.

What happens when the limiting reactant in a chemical reaction is completely used up?

• Excess reactants begin combining

• Reaction slows down

• Reaction speeds up

• Reaction stops

The limiting reactant

• slows the reaction down

• is used up first

• is the reactant that is left over

• controls the speed of the reaction

When does a chemical reaction stop?

• When the lab is finished

• When the excess reactant is used up

• When the limiting reactant is used up

• Chemical reactions never stop