May 09, 2013
A combination question (solution and gravimetric)
What mass of precipitate is produced by the reaction of 20.0 mL
of 0.210 mol/L sodium sulfide with an excess quantity of
aluminium nitrate solution?
May 09, 2013
May 09, 2013
May 09, 2013
Gas Stoichiometry
3 Types of Problems
1) Avogadro's Hypothesis
-equal volumes of gas contain equal particles
2) Ideal Gas Law
PV = nRT
3) Molar Volume
V = nv
SATP v = 24.8 L/mol
STP v = 22.4 L/mol
May 09, 2013
Example 1
What volume of oxygen is required to burn 500 mL of propane gas at
SATP?
Example 2
Hydrogen gas is produced when sodium metal is added to
water. What mass of sodium is necessary to produce 20.0 L
of hydrogen at SATP?
May 09, 2013
Example 3
Ammonia is produced from the reaction of nitrogen and hydrogen.
What volume of ammonia at 450 kPa and 80˚C can be obtained from
the complete reaction of 7.5 kg of hydrogen?
May 09, 2013
Homework
Page 286 #20c
PAge 287 # 24c, 27
Answers are in the back of the textbook
Page 289-290
2,3,10,14 (assigned Thursday)
16, 19, 20 (assigned today)
Hand all of these questions
May 09, 2013
May 09, 2013