WorksheetsLimited Reactant
Total questions: 25
Worksheet time: 25mins
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
The limiting reactant
slows the reaction down
is used up first
is the reactant that is left over
controls the speed of the reaction
SO2 + PCl5 --> SOCl2 + POCl3
How much SOCl2 is produced when 16.2g SO2 react with 13.7g PCl5?
7.87g
30.1g
26.4g
19.8g
What is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2O
NH3
NO
N2
water
Which reactant is the limiting reagent and why?
Hydrogen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.
Oxygen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.
Which reactant is the limiting reagent and why?
Hydrogen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.
Oxygen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.
4NH3 + 5O2 --> 4NO + 6H2O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen?
0.37g
0.045g
1.35g
11.1g
Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?
Fe
S
FeS
none
What is the limiting reactant if 15 GRAMS of NH3 react with 16 GRAMS of NO?
4NH3+6NO --> 5N2 + 6H2O
(Remember, convert grams to moles, then divide each substance by the number of moles given as the coefficient from the balanced chemical equation).
NH3 is the limiting because the reaction only requires 0.22 mol of NH3
NO is the limiting reactant because the reaction only requires 0.088 mol NO
NH3 is the limiting because the reaction only requires 0.88 mol of NH3
NO is the limiting reactant because the reaction only requires 0.53 mol NO
A reactant that is totally consumed during a chemical reaction, limits the extent of the reaction, and determines the amount of product
stoichiometry
mole ratio
excess reactant
limiting reactant
A chemical reaction involving substances A and B stops when B is completely used. B is the
excess reactant
primary reactant
limiting reactant
primary product
How do you determine the limiting reactant?
Find the amount of product produced by each amount of reactant. The reactant that makes the most is the limiting reactant.
Find the amount of product produced by each amount of reactant. The reactant that makes the least is the limiting reactant.
The reactant with the least amount of mass (grams) present is the limiting reactant.
Cannot be determined.
In a chemical reaction, what is the role of a limiting reactant?
It speeds up the reaction
It determines the amount of product formed
It is the reactant in excess
It is the reactant that remains unchanged
When 5 moles of hydrogen react with 3 moles of oxygen to form water, which is the limiting reactant?
Hydrogen
Oxygen
Water
None
In the reaction @@ ext{2H}_2 + ext{O}_2 ightarrow ext{2H}_2 ext{O} ,ifyoustartwith4molesof ext{H}_2 and2molesof ext{O}_2@@, what is the limiting reactant?
H2
O2
H2O
None
What happens to the excess reactant in a chemical reaction?
It is completely used up
It remains after the reaction
It forms the main product
It determines the reaction rate
In a reaction between nitrogen and hydrogen to form ammonia, if 10 grams of nitrogen react with 10 grams of hydrogen, which is the limiting reactant?
Nitrogen
Hydrogen
Ammonia
None
How can you identify the limiting reactant in a chemical equation?
By comparing the masses of reactants
By comparing the moles of reactants
By comparing the volumes of reactants
By comparing the densities of reactants
In the reaction @@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O} ,ifyouhave2molesof ext{C}_3 ext{H}_8 and10molesof ext{O}_2@@, what is the limiting reactant?
C3H8
O2
CO2
H2O
Why is it important to identify the limiting reactant in a chemical reaction?
To increase the reaction speed
To predict the amount of product formed
To reduce the cost of reactants
To ensure complete reaction
In a laboratory experiment, 50 grams of zinc react with 50 grams of sulfur. Which is the limiting reactant?
Zinc
Sulfur
Zinc sulfide
None
What is the result of a reaction when the limiting reactant is completely consumed?
The reaction stops
The reaction speeds up
The reaction continues
The reaction reverses
In the reaction @@ ext{2Na} + ext{Cl}_2 ightarrow ext{2NaCl} ,ifyoustartwith3molesof ext{Na} and1moleof ext{Cl}_2@@, what is the limiting reactant?
Na
Cl2
NaCl
None
How does the concept of limiting reactant apply to real-world chemical manufacturing?
It helps in maximizing product yield
It reduces the need for catalysts
It increases the purity of products
It decreases the energy consumption
In a reaction where 8 grams of carbon react with 8 grams of oxygen to form carbon dioxide, which is the limiting reactant?
Carbon
Oxygen
Carbon dioxide
None
