Interpretation:
The oxidation number of the underlined species in
Concept introduction:
A species gain or loses electrons to form anions or cations respectively. To keep a track on the loss or gain of an electron, a number is assigned in the form of oxidation number. The rules used to determine oxidation number of an atom in a molecule is shown below.
• For each atom in its elemental state, the oxidation number is zero.
• For a monoatomic ion, the oxidation number is same as the charge on that species.
• The oxidation number of combined oxygen is
• The sum of oxidation numbers in a molecule or polyatomic ion or molecule is equal to the overall charge on the species.
Trending nowThis is a popular solution!
Chapter 19 Solutions
Introductory Chemistry: An Active Learning Approach
- Decide whether a reaction occurs for each of the following. If it does not, write NR after the arrow. If it does, write the balanced molecular equation; then write the net ionic equation. a Al(OH)3 + HNO3 b NaBr + HClO4 c CaCl2 + NaNO3 d MgSO4 + Ba(NO3)2arrow_forwardSodium thiosulfate, Na2S2O3, is used as a fixer in black-and-white photography. Suppose you have a bottle of sodium thiosulfate and want to determine its purity. The thiosulfate ion can be oxidized with I2 according to the balanced, net ionic equation I2(aq) + 2 S2O32(aq) 2 I(aq) + S4O62 (aq) If you use 40.21 mL of 0.246 M I2 in a titration, what is the weight percent of Na2S2O3 in a 3.232-g sample of impure material?arrow_forwardThe exposed electrodes of a light bulb are placed in a solution of H2SO4 in an electrical circuit such that the light bulb is glowing. You add a dilute salt solution, and the bulb dims. Which of the following could be the salt in the solution? a. Ba(NO3)2 b. NaNO3 c. K2SO4 d. Ca(NO3)2 Justify your choices. For those you did not choose, explain why they are incorrect.arrow_forward
- Write the net ionic equation and identify the spectator ion or ions in the reaction of nitric acid and magnesium hydroxide. What type of reaction is this? 2 H3O+(aq) + 2 NO3(aq) + Mg(OH)2(s) 4 H2O() + Mg2+(aq) + 2 NO3(aq)arrow_forwardAssign oxidation numbers to the underlined element. 1) K 2) SO2 3) K2O2 4 4) Cr2O7 -arrow_forward1, Find the oxidation numbers of the elements in bold print. a) HClO d) PbSO4 g) Na2O2 b) KClO3 e) NaIO4 h) K2SO4 c) MnO2 f) ClO41- i) NH41+ 2, State whether the change is an oxidation or a reduction. a) MnO41– becomes MnO42– __________d) P4O6 becomes P4O10 ____________ b) N2 becomes NH3 ____________ e) NH3 becomes N2O ____________ c) O2- becomes O2 ____________ f) SO42– becomes S2O32– ____________arrow_forward
- In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. Zn+I2+4OH^- -----= Zn(OH)4^2-+2I^-arrow_forwardtrue or false? The following reaction equation is a redox reaction: 2H2O (l) + 2Cl- (aq) ⟶ H2 (g) + Cl2 (g) + 2OH- (aq)arrow_forwardGive the symbol and the oxidation number of the following : potassium ion 6. hydrogen ion ferrous ion 7. manganous ion chlorine gas 8. copper (I) ion sodium ion 9. fluoride ion oxide ion 10. chromic ionarrow_forward
- 2CrO42- + 3Pb+ 5H2O2Cr(OH)3 + 3HPbO2-+ OH- In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.arrow_forwardI2(s) + OCl-(aq) → IO3-(aq) + Cl-(aq) Referring to the equation above, what is the oxidation number of Cl in OCl-(aq)?arrow_forwardFor each of the following reactions, assign oxidation numbers to each atom/ion and indicate whether the equation represents a redox reaction. If it does, identify the oxidation and reduction components. a) Cu (s) + 2 AgNO3 (aq) → 2 Ag (s) + Cu(NO3)2 (aq) b) 2 NaCl (l) → 2 Na (l) + Cl2 (g) c) 2 C4H10 (g) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (l) d) 2 H2O2 (l) → 2 H2O (l) + O2 (g)arrow_forward
- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781337399074Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage LearningChemistry & Chemical ReactivityChemistryISBN:9781133949640Author:John C. Kotz, Paul M. Treichel, John Townsend, David TreichelPublisher:Cengage Learning
- General Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage LearningIntroductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage Learning