Ch.4 - Chemical Quantities & Aqueous ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Which compound has the atom with the highest oxidation number?a. casb.na3nc. mgso3d. al(no2)3

Problem

Which compound has the atom with the highest oxidation number?

a. cas

b.na3n

c. mgso3

d. al(no2)3


Solution

We are asked to identify the compound which has the atom with the highest oxidation number.


The rules for oxidation states (O.S.) are as follows:

A. General Rules:

1. For an atom in its elemental form (Zn, Cl2, C(graphite), etc.)    O.S. = 0

2. For an ion (Li+, Al3+, etc.)                                                       O.S. = charge


B. Specific Rules:

1. Group 1A            O.S. = +1

2. Group 2A            O.S. = +2

3. Hydrogen            O.S. = +1, with nonmetals

 O.S. = –1 with metals and boron

4. Fluorine               O.S. = –1

5. Oxygen               O.S. = –1 in peroxides (X2O2, X = Group 1A)

    O.S. = –1/2 in superoxides (XO2, X = Group 1A)

    O.S. = –2 in other compounds

6. Group 7A            O.S. = –1 (except when bonded to O)


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