Download 1 Chemistry 201 Name Assignment 2 1. Consider the following

Chemistry 201
Assignment 2
Name _______________________________
1. Consider the following reaction:
Al2S3 + 6 H2O 2 Al(OH)3 + 3 H2S
If 24.3 g of Al2S3 were reacted with an excess of H2O, then:
a) What is the theoretical yield of Al(OH)3?
b) What is the theoretical yield of H2S?
2. What mass of O2 is required for the complete combustion of 6.19 g of propane (C3H8) to
produce CO2 and H2O?
3. An excess of O2 reacted with 3.40 g of Fe. What is the percent yield if 4.15 g of Fe2O3 are
isolated?
4. How many liters of O2 gas measured at 816 torr and 250.0°C are formed by the decomposition
of 291 g of KClO? (Hint: You will need a balanced equation where KClO is the reactant. The
other product is KCl.)
5. Construct the reaction table for the reaction of 1.46 mol of Al with 3.60 mol of HCl to produce
AlCl3 and H2. (Hint #1: be sure to balance the equation first! Hint #2: don't forget that signs are
important in reaction tables!)
Al HCl
AlCl3 H2
initial
final
6. Consider the experiment where 38.1 g of Ca3N2 reacts with 93.6 g of H2O. The products of the
reaction are Ca(OH)2 and NH3.
a) What is the limiting reactant?
calcium nitride
water
b) What is the theoretical yield of Ca(OH)2?
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