chemistry

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chemistry
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Naming and Writing Formulas for Ionic Compounds
9.2

• A recipe is a formula for the saucea complete
  list of ingredients and their proportions.
  Chemistry also uses formulas. Once you know the
  rules, you can write the formula for any chemical
  compound.

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Binary Ionic Compounds
9.2

• Binary Ionic Compounds
• How are the names of binary ionic compounds
  determined?
• How do you write the formulas for binary ionic
  compounds?

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Binary Ionic Compounds
9.2

• These masks are made of an ionic compound with
  the common name gypsum. This name does not tell
  you anything about the chemical composition of
  the compound, though.

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Binary Ionic Compounds
9.2

• Naming Binary Ionic Compounds
• A binary compound is composed of two elements and
  can be either ionic or molecular.
• To name any binary ionic compound, place the
  cation name first, followed by the anion name.

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Binary Ionic Compounds
9.2

• Tin(II) sulfide, or SnF2, is added to toothpastes
  to prevent cavities.

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Binary Ionic Compounds
9.2

• Tin(IV) sulfide, or SnS2, is used in glazes for
  porcelain fixtures and dishes.

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Binary Ionic Compounds
9.2

• Hematite, a common ore of iron, contains iron
  (III) oxide. The balanced formula is Fe2O3.

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Binary Ionic Compounds
9.2

• Writing Formulas for Binary Ionic Compounds
• Write the symbol of the cation and then the
  anion. Add whatever subscripts are needed to
  balance the charges.

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Simulation 9

• Simulation 9 Simulate combining ions and deriving
  the chemical formulas for several ionic
  compounds.

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Conceptual Problem 9.2
9.2
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Conceptual Problem 9.2
9.2
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Conceptual Problem 9.2
9.2
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Sample Problems For Conceptual Problem 9.2
for Conceptual Problem 9.2
Problem Solving 9.11 Solve Problem 11 with the
help of an interactive guided tutorial.
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Compounds With Polyatomic Ions
9.2

• Compounds with Polyatomic Ions
• How do you write the formulas and names of
  compounds containing polyatomic ions?

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Compounds With Polyatomic Ions
9.2

• Write the symbol for the cation followed by the
  formula for the polyatomic ion and balance the
  charges.

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Compounds With Polyatomic Ions
9.2

• For example, calcium nitrate is composed of a
  calcium cation (Ca2) and a polyatomic nitrate
  anion (NO3).
• In calcium nitrate, two nitrate anions, each with
  a 1 charge, are needed to balance the 2 charge
  of each calcium cation. The formula for calcium
  nitrate is Ca(NO3)2.

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Compounds With Polyatomic Ions
9.2

• Oysters produce calcium carbonate to form their
  shells and sometimes pearls.

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Compounds With Polyatomic Ions
9.2

• Lead(II)sulfate is an important component of an
  automobile battery.

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Conceptual Problem 9.3
9.3
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Conceptual Problem 9.3
9.3
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Conceptual Problem 9.3
9.3
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Practice Problems For Conceptual Problem 9.3
for Conceptual Problem 9.3
Problem-Solving 9.12 Solve Problem 12 with the
help of an interactive guided tutorial.
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Compounds With Polyatomic Ions
9.2

• Naming Compounds with Polyatomic Ions
• To name a compound containing a polyatomic ion,
  state the cation first and then the anion, just
  as you did in naming binary ionic compounds.

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Compounds With Polyatomic Ions
9.2

• Sodium hypochlorite (NaClO) is used as a
  disinfectant for swimming pools. The metallic
  cation in this compound is sodium (Na) so the
  polyatomic ion must be ClO.

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9.2 section Quiz.

• Assess students understanding of the concepts in
  Section 9.2.

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9.2 Section Quiz

• 1. The correct name for CrCl3 is
• chromium chlorine.
• chromium(III) chloride.
• monochromium trichloride.
• chromium(III) trichloride.

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9.2 Section Quiz

• 2. What is the correct formula for strontium
  nitride?
• Sr3N2
• SrN2
• Sr2N3
• Sr3N

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9.2 Section Quiz

• 3. Which one of the following compounds is named
  correctly?
• sodium chlorite, NaClO
• potassium nitrate, KNO2
• sodium acetate, NaC2H3O2
• lithium sulfate, Li2SO3

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END OF SHOW