C hem 250
C hapter 11 Study G uide
T he M ole
11.1
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11.2
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Measuring Matter
Describe how a mole is used in chemistry.
Relate a mole to common counting units.
Convert moles to number of representative particles and number of representative particles to moles.
Mass and the Mole
Relate the mass of an atom to the mass of a mole of atoms.
Calculate the number of moles in a given mass of an element and the mass of a given number of moles of
an element.
• Calculate the number of moles of an element when given the number of atoms of the element.
• Calculate the number of atoms of an element when given the number of moles of the element.
11.3 Moles of Compounds
• Recognize the mole relationships shown by a chemical formula.
• Calculate the molar mass of a compound.
• Calculate the number of moles of a compound from a given mass of the compound, and the mass of a
compound from a given number of moles of the compound.
• Determine the number of atoms or ions in a mass of a compound.
11.4 Empirical and Molecular Formulas
• Explain what is meant by the percent composition of a compound.
• Determine the empirical and molecular formulas for a compound from mass percent and actual mass data.
Vocabulary words to know: mole, Avogadro’s number, molar mass, percent composition, empirical formula,
molecular formula
You are not responsible for Section 11.5 on Hydrates
WebAssign for Chapter 11 is due Monday, Dec. 9 at 11:00 pm.
mass of a substance  moles of a substance  # of particles of a substance
Thursday
In Class:
Homework:
11-21-13
Chapter 10 Test. Lab 8 Precipitation Reactions due.
Friday
In Class:
Homework:
11-22-13
The mole, relationship between particles and moles of a substance.
Read 11.1 and 11.2, problems #1-#4, check your answers in Appendix D.
Monday
In Class:
Homework:
11-25-13
Molar mass of elements and compounds.
Read 11.3, problems #11a-b, #12a-b, #25, #26 (first two compounds in each), check your answers
in Appendix D, WebAssign.
Cont. on back side…
Tuesday
In Class:
Homework:
11-26-13
mass of a substance  moles of a substance  # of particles of a substance.
Problems #13a-b, #14a-b, #27, #30a-b, #32, check your answers in Appendix D.
Wed-Sun
11-27-13 to 12-1-13
Monday
In Class:
Homework:
12-2-13
Calculating # of ions / atoms of a substance, calculating mass of molecules and formula units.
Read 11.4, problems #20, #21, #31, #33, check your answers in Appendix D. WebAssign.
Tuesday
In Class:
Homework:
12-3-13
More # ions / atoms  mass of a substance, percent composition.
Problem #44. WebAssign.
Wednesday
In Class:
Homework:
12-4-13
Mole Lab.
WebAssign.
Thursday
In Class:
Homework:
12-5-13
% composition, empirical formulas, molecular formulas.
Problems #46, #54, #51, #52, WebAssign. Read and prepare for Lab 7: Determination of the
Empirical Formula for Manganese Chloride.
Do the Preliminary Study problem before coming to the lab.
Friday
In Class:
Homework:
12-6-13
Special Schedule – Fine Arts Assembly
Start Lab 7: Determination of the Empirical Formula for Manganese Chloride.
WebAssign.
Monday
In Class:
Homework:
12-9-13
Complete the lab work for Lab 7: Determination of the Empirical Formula for Manganese Chloride,
the lab report is due on Wednesday.
Study for Chapter 11 test. WebAssign due tonight at 11:00 pm.
Tuesday
In Class:
Homework:
12-10-13
Chapter 11 test.
Lab 7: Determination of the Empirical Formula for Manganese Chloride due tomorrow.
Thanksgiving Break
Sophomore Class Mass