fundamental skills review

fundamental skills review - Chemistry 1A03 Introductory...

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Unformatted text preview: Chemistry 1A03 Introductory Chemistry I Chemistry in the context of health, energy and the environment Fundamental Skills Review - Highlights of selected topics from Ch 1-4, 6 Chem 1A03 2 Chemistry Its Elemental! (2 6) Chemistry Its Elemental! (2 6) Period = ? Group = ? Colours = ? Chem 1A03 Chem 1A03 3 Elements at work Elements at work Chem 1A03 Chem 1A03 4 Elements at work and play Elements at work and play Chem 1A03 Chem 1A03 5 Oxidation State or Ox. Number (3 4) Oxidation State or Ox. Number (3 4) actual charge of a monatomic ion Cl- (-1), Mg 2+ (+2) hypothetical charge of an atom in a molecule or polyatomic ion CO 2 (C = +4, O = -2) SO 4 2- (S = +6, O = -2) Rules for assigning O.S. (O.N): Table 3.2 (p. 85, 10 th ed.) Chem 1A03 Chem 1A03 Oxidation Numbers Exercise Oxidation Numbers Exercise Assign an oxidation number (O.N.) to each atom: Cl 2 Na 2 O ClO 4- PF 3 H 2 S NaH H 2 O 2 6 Chem 1A03 Chem 1A03 Nomenclature (3 6) Nomenclature (3 6) Simple ions recognizing O.N. Fe(II), Fe 2+ vs. Fe(III), Fe 3+ Ionic compounds Table 3-3 NaCl Binary molecular compounds Table 3-4 N 2 O 3 Polyatomic ions Table 3-5 CrO 4 2- Oxoacids & Their Salts Table 3-6; binary acids HClO, ClO- 7 Chem 1A03 Chem 1A03 8 Mole/mass (2 7) Mole/mass (2 7) 6.022 14199 x 10 23 mol-1 mass 1 H atom = 1.0079 amu mass 1 mol H atoms = 1.0079 g mol-1 M m n molar Mass (M) = mass (m) / mole (n) Chem 1A03 Chem 1A03 9 Mole/mass Exercise (2 8) Mole/mass Exercise (2 8) Calculate the number of Cu atoms present in a copper penny weighing 2.4149 g. Data needed? Estimate: Solution: Chem 1A03 Chem 1A03 10 10 10 10 Representations of Structure (3 1) Representations of Structure (3 1) Ionic compounds: cations (M + ) + anions (X- ) formula unit (MX) Exercise: write the formula unit for: Groups sodium chloride 1, 17 NaCl potassium sulfide 1, 16 K 2 S magnesium fluoride 2, 17 MgF 2 Chem 1A03 Chem 1A03 11 11 11 11 Representations of Structure Representations of Structure Molecules: Empirical formula CH 2 O simplest atom ratio Molecular formula C 2 H 4 O 2 actual atom ratio Structural formula (connectivity) Chem 1A03 Chem...
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fundamental skills review - Chemistry 1A03 Introductory...

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