Textbook Question
What is the oxidation state of Cl in each ion? a. ClO- b. ClO2- c. ClO3- d. ClO4-
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Ch.4 - Chemical Quantities & Aqueous Reactions
Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831
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Table of contents
- Ch.1 - Matter, Measurement & Problem Solving107
- Ch.2 - Atoms & Elements100
- Ch.3 - Molecules, Compounds & Chemical Equations127
- Ch.4 - Chemical Quantities & Aqueous Reactions114
- Ch.5 - Gases103
- Ch.6 - Thermochemistry92
- Ch.7 - Quantum-Mechanical Model of the Atom50
- Ch.8 - Periodic Properties of the Elements89
- Ch.9 - Chemical Bonding I: The Lewis Model84
- Ch.10 - Chemical Bonding II: Molecular Shapes & Valence Bond Theory74
- Ch.11 - Liquids, Solids & Intermolecular Forces60
- Ch.12 - Solids and Modern Material50
- Ch.13 - Solutions90
- Ch.14 - Chemical Kinetics111
- Ch.15 - Chemical Equilibrium65
- Ch.16 - Acids and Bases135
- Ch.17 - Aqueous Ionic Equilibrium145
- Ch.18 - Free Energy and Thermodynamics92
- Ch.19 - Electrochemistry100
- Ch.20 - Radioactivity and Nuclear Chemistry68
- Ch.21 - Organic Chemistry121
Chapter 4, Problem 95c
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.
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)
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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)
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Textbook Question
What is the oxidation state of Cr in each compound? b. CrO3
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Textbook Question
Assign oxidation states to each atom in each element, ion, or compound. Cl2, Fe3+, CuCl2, CH4, Cr2O72–, HSO4–
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Textbook Question
Complete and balance each gas-evolution equation. a. HNO3(aq) + Na2SO3(aq) →
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