Stoichiometry Review Problems

For the questions on this worksheet, consider the following equation:

Ca(OH)2(s) + 2 HCl(aq) ---> CaCl2(aq) + 2 H2O(l)


1) What type of chemical reaction is taking place? _____________________

2) How many liters of 0.100 M HCl would be required to react completely with 5.00 grams of calcium hydroxide?


3) If I combined 15.0 grams of calcium hydroxide with 75.0 mL of 0.500 M HCl, how many grams of calcium chloride would be formed?


4) What is the limiting reagent from the reaction in problem #3? __________

5) How many grams of the excess reagent will be left over after the reaction in problem 3 is complete?


Solve the following stoichiometry grams-grams problems:

1) Using the following equation:

2 NaOH + H2SO4 ---> 2 H2O + Na2SO4

How many grams of sodium sulfate will be formed if you start with 200 grams of sodium hydroxide and you have an excess of sulfuric acid?


2) Using the following equation:

Pb(SO4)2 + 4 LiNO3 ---> Pb(NO3)4 + 2 Li2SO4

How many grams of lithium nitrate will be needed to make 250 grams of lithium sulfate, assuming that you have an adequate amount of lead (IV) sulfate to do the reaction?

Percent Yield Practice

1) Write the equation for the reaction of iron (III) phosphate with sodium sulfate to make iron (III) sulfate and sodium phosphate.

2) If I perform this reaction with 25 grams of iron (III) phosphate and an excess of sodium sulfate, how many grams of iron (III) sulfate can I make?


3) If 18.5 grams of iron (III) sulfate are actually made when I do this reaction, what is my percent yield?


4) Is the answer from problem #3 reasonable? Explain.


5) If I do this reaction with 15 grams of sodium sulfate and get a 65.0% yield, how many grams of sodium phosphate will I make?