CHEM 120: Introduction to
Inorganic Chemistry
Chapters Covered and Test
dates
Chapter 5. Calculations
and the Chemical Equation
The mole concept and
atoms
"Where did I get the..."
Avogadro’s number
Slide 7
Useful relationship
Some problems
"Which of the
following has..."
"What’s the mass,"
Compounds
The mole concept applied
to compounds
"In general we talk
about"
Molar mass
"Mass of one mole of..."
"Calc the molar"
"5.38."
"5.40."
"Calc the no."
Law of conservation of
mass
"mercury + oxygen
---> mercury(II)oxide"
"reactants g"
"To balance:"
Slide 25
Slide 26
Balancing chemical eqns
"Start by balancing
elements that..."
To balance
"Now figure out how
to..."
"3H2 + N2
g 2NH3"
Balance
Balance
Balance
Calculations using the
chemical eqn
Chemical Reaction
Chemical reactions
2H2 + O2
g 2H2O
2H2 + O2
g 2H2O
2H2 + O2
g 2H2O
Mass relationships
in chemical equations
General prescription
Problems
"C3H8
+"
"A 4.00 g sample of..."
Theoretical and percent
yield
"Theoretical yield -
amount of..."
"Theoretical yield
is what we..."
"If the % yield of..."
"A 3.5 g sample of..."