Stoichiometry
For the 1987 Copyright of The Addison Wesley Textbook
2) Explain why it is necessary to convert the given units of substances to moles when solving
a stoichiometry problem.
3) What are teh steps involved indetermining a limiting reagent?
4) How many moles of water are needed to react completely with 12 moles of sodium
according to the balanced equation that follows:
2 Na + 2 water --> 2 NaOH + hydrogen gas
5) How many grams of lead(II) iodide are produced from 6.0 mol sodium iodide according
to the following equation:
lead(II) nitrate + sodium iodide yields sodium nitrate + lead(II) iodide
6) Use the following reaction to determine what mass of iron(II) sulfate must react to form
326 g of iron(II) chloride:
iron(II) sulfide + hydrochloric acid yields hydrosulfuric acid + iron(II) chloride
7) Hydrogen gas reacts with oxygen gas to produce water. If a student fills a 250-mL flask
with hydrogen at STP, what volume of oxygen is necessary for the reaction?
8) Using the reaction shown, identify the limitng reagent in each of the following examples.
4 Al + 3 O2 --> 2 Al2O3
a. 0.25 mol Al and 0.40 mol oxygen
b. 58.5 g Al and 98.0 g oxygen
c. 78.2 g Al and 113.1 g oxygen
9) When octane (C8H18) is burned in oxygen, carbon dioixde and water are produced. If
320 g of octane is burned and 392 g of water is recovered, what is the perecent yield of
the experiment?
10) If 3.89 g of magnesium hydoxide is added to a flask containing 1.78 g hydrochloric
acid, what mass of magnesium chloride will be produced?
