Name: _________________________ Date: ____________ Period: ______
Limiting Reagents- Practice Problems: You MUST SHOW ALL YOUR WORK
TO RECEIVE FULL CREDIT.
1.) Propane (C3H8) is a component of natural gas and is used in domestic cooking and heating.
(a) Balance the following equation representing the combustion of propane in
air:
____C3 H8 + ____ O2 -----> ____ CO2 + ____ H2O
b) How many grams of CO2 can be produced by burning 3.65 moles of
C3 H8? Assume that O2 is the excess reagent in this reaction.
2.) _1_ MnO2 + 4 HCl ----> __1__ MnCl2 + __1__ Cl2 + _2__H2O
If 0.86 mole of MnO2 and 48.2 g of HCl react
a.) Which reagent will be used up first? Show your work. Use Reactants and Cl2
= _________________g MnO2
=
__________g HCl
b.) How many grams of Cl2 will be produced?
3.) In the production of disulfur dichloride, molten sulfur reacts with chlorine gas
according to the equation below:
1S8 (l) + 4 Cl2(g) ----> 4S2Cl2(l)
If 200.0 g of S react with 100.0g of Cl2,
a.) what mass of disulfur dichloride (S2Cl2 )is produced?
b.) What reactant is the limiting reagent? Show your work.
c.) What reactant is the excess reagent? Show your work.
d.) How much of the excess reagent is left in grams?