Textbook Question
What is the oxidation state of Cl in each ion? a. ClO- b. ClO2- c. ClO3- d. ClO4-
Ch.5 - Introduction to Solutions and Aqueous Solutions
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217
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Table of contents
- Ch.1 - Matter, Measurement & Problem Solving118
- Ch.2 - Atoms & Elements106
- Ch.3 - Molecules and Compounds131
- Ch.4 - Chemical Reactions and Chemical Quantities56
- Ch.5 - Introduction to Solutions and Aqueous Solutions82
- Ch.6 - Gases114
- Ch.7 - Thermochemistry96
- Ch.8 - The Quantum-Mechanical Model of the Atom60
- Ch.9 - Periodic Properties of the Elements90
- Ch.10 - Chemical Bonding I: The Lewis Model89
- Ch.11 - Chemical Bonding II: Molecular Shapes, VSEPR & MO Theory85
- Ch.12 - Liquids, Solids & Intermolecular Forces51
- Ch.13 - Solids & Modern Materials47
- Ch.14 - Solutions90
- Ch.15 - Chemical Kinetics115
- Ch.16 - Chemical Equilibrium68
- Ch.17 - Acids and Bases136
- Ch.18 - Aqueous Ionic Equilibrium153
- Ch.19 - Free Energy & Thermodynamics93
- Ch.20 - Electrochemistry106
- Ch.21 - Radioactivity & Nuclear Chemistry74
- Ch.22 - Organic Chemistry140
Chapter 5, Problem 71c
What is the oxidation state of Cr in each compound? c. Cr2O3
Verified step by step guidance1
Identify the oxidation state of oxygen in compounds, which is typically -2.
Let the oxidation state of chromium (Cr) be x.
Write the chemical formula Cr2O3, which indicates there are 2 Cr atoms and 3 O atoms.
Set up the equation based on the sum of oxidation states: 2(x) + 3(-2) = 0, because the compound is neutral.
Solve the equation for x to find the oxidation state of Cr.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Oxidation State
The oxidation state, or oxidation number, is a value that represents the total number of electrons an atom either gains or loses when it forms a chemical bond. It helps in understanding the electron transfer in redox reactions and is crucial for determining the reactivity and stability of compounds.
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02:42
Oxidation Numbers
Rules for Assigning Oxidation States
There are specific rules for assigning oxidation states, such as the fact that the oxidation state of an element in its elemental form is zero, and for monoatomic ions, it equals the charge of the ion. In compounds, the sum of the oxidation states must equal the overall charge of the compound, which is particularly important for polyatomic compounds.
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03:13Oxidation Number Rules
Chromium Compounds
Chromium can exhibit multiple oxidation states, commonly +2, +3, and +6. In the compound Cr2O3, chromium is in the +3 oxidation state, as the oxygen typically has an oxidation state of -2, leading to a total of +6 from two chromium atoms to balance the three oxygen atoms.
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Related Practice
Textbook Question
Determine whether each reaction is a redox reaction. For each redox reaction, identify the oxidizing agent and the reducing agent. a. 4 Li(s) + O2(g) → 2 Li2O(s) b. Mg(s) + Fe2+(aq) → Mg2+(aq) + Fe(s)
Textbook Question
Determine whether each reaction is a redox reaction. For each redox reaction, identify the oxidizing agent and the reducing agent. c. Pb(NO3)2(aq) + Na2SO4(aq) → PbSO4(s) + 2 NaNO3(aq) d. HBr(aq) + KOH(aq) → H2O(l) + KBr(aq)
Textbook Question
What is the oxidation state of Cr in each compound? b. CrO3
Textbook Question
Assign oxidation states to each atom in each element, ion, or compound. Cl2, Fe3+, CuCl2, CH4, Cr2O72–, HSO4–
Textbook Question
What is the oxidation state of Cr in each compound? a. CrO