Limiting Reagents I (CHEM 1405)

Back to Chemistry 1405 Practice Problems

Balance the equations, then solve for the required substance using dimensional analysis.

1)  Nitrogen and oxygen react to form dinitrogen monoxide.

N2      +      O2      Arrow.png      N2O

If 7.4 grams of nitrogen reacts, how many grams of dinitrogen monoxide is produced?

 

 

If 6.8 grams of oxygen reacts, how many grams of dinitrogen monoxide is produced?

 

 

Based on the information above, which would be the limiting reagent? __________________________

2)  Potassium and chlorine combined to make potassium chloride.

K      +      Cl2      Arrow.png      KCl

If 0.14 g potassium reacts, how many grams of KCl is produced?

 

 

If 0.23 g chlorine reacts, how  many grams of KCl is produced?

 

 

Based on the information above, which would be the limiting reagent? _______________________________

3)  Aluminum reacts with oxygen to yield aluminum oxide.

Al      +      O2      Arrow.png      Al2O3

If you have 14.5 g of aluminum, how many grams of aluminum oxide is produced?

 

 

If you have 7.5 g of oxygen, how many grams of aluminum oxide is produced?

 

 

Based on the information above, which would be the limiting reagent? _______________________________

4)  Copper II sulfide reacts with oxygen to produce copper II oxide and sulfur dioxide.

CuS      +      O2      Arrow.png      CuO      +      SO2

If you have 18.7 g of copper II sulfide, how many grams of copper II oxide is produced?

 

 

If you have 12.0 g of oxygen gas, how many grams of copper II oxide is produced?

 

 

Based on the information above, which would be the limiting reagent? __________________________________

5)  Nitrogen and hydrogen react to produce ammonia (NH3).

N2      +      H2      Arrow.png      NH3                 

If you have 2.6 g of nitrogen, how many grams of ammonia is produced?

 

 

If you have 1.7 g of hydrogen, how many grams of ammonia is produced?

 

 

Based on the information above, which would be the limiting reagent? ____________________________________

6)  Hydrogen chloride is made by reacting sodium chloride with aqueous hydrogen sulfate.

NaCl      +      H2SO4      Arrow.png      Na2SO4      +      HCl          

If you have 30.0 g of sodium chloride, how many grams of hydrogen chloride are produced?

 

 

If you have 2.59 g of hydrogen sulfate, how many grams of hydrogen chloride are produced?

 

 

Based on the information above, which would be the limiting reagent? ______________________________________