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: What is the oxidation number of Cl in perchloric acida. +7b. +5c. +1d. -1e. -5

Problem

What is the oxidation number of Cl in perchloric acid

a. +7

b. +5

c. +1

d. -1

e. -5

Solution

Determine the molecular formula of perchloric acid and calculate for the oxidation number of Cl using the rules for oxidation states

Rules for Naming Oxyacids:

a. If the polyatomic ion ends with -ate then change the ending to -ic acid

b. if the polyatomic ion ends with -ite then change the ending to -ous acid


  • If we have perchloric acid, it must have come from perchlorate ion
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