Redox Reactions in Aqueous Solutions
Chemistry ⇒ Redox Reactions and Electrochemistry
Redox Reactions in Aqueous Solutions starts at 10 and continues till grade 12.
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Balance the following redox reaction in acidic solution: Cr2O72- + Fe2+ → Cr3+ + Fe3+
Calculate the change in oxidation number of Fe in the reaction: Fe2+ → Fe3+ + e-
Describe the role of water in redox reactions in aqueous solutions.
Describe the steps to balance a redox reaction in acidic aqueous solution using the ion-electron method.
Balance the following redox reaction in acidic solution: Cr2O72- + Fe2+ → Cr3+ + Fe3+
Calculate the change in oxidation number of Fe in the reaction: Fe2+ → Fe3+ + e-
Fill in the blank: In the reaction 2H2O2(aq) → 2H2O(l) + O2(g), the species that is both oxidized and reduced is __________.
Fill in the blank: In the reaction 2Na(s) + Cl2(g) → 2NaCl(s), sodium acts as the __________ agent.
Which of the following best describes a disproportionation reaction? (1) A reaction where a single substance is both oxidized and reduced (2) A reaction where two substances are oxidized (3) A reaction where two substances are reduced (4) A reaction with no electron transfer
Which of the following is a common oxidizing agent in aqueous solutions? (1) H2O (2) H2SO4 (3) KMnO4 (4) NaCl
Which of the following is a redox reaction? (1) HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l) (2) 2K(s) + Br2(l) → 2KBr(s) (3) AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq) (4) BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq)
Which of the following is NOT a redox reaction? (1) NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq) (2) Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s) (3) 2FeCl2(aq) + Cl2(g) → 2FeCl3(aq) (4) 2H2O2(aq) → 2H2O(l) + O2(g)
Fill in the blank: In aqueous solutions, ions that do not participate in the redox reaction are called __________ ions.
Fill in the blank: In the reaction 2H2O2(aq) → 2H2O(l) + O2(g), the species that is both oxidized and reduced is __________.
Fill in the blank: In the reaction 2Na(s) + Cl2(g) → 2NaCl(s), sodium acts as the __________ agent.
Fill in the blank: The gain of electrons by a substance is called __________.
True or False: In a redox reaction, the oxidizing agent is always reduced.
True or False: In a redox reaction, the total number of electrons lost equals the total number of electrons gained.
True or False: In an aqueous solution, the solvent is always water.
True or False: In aqueous solutions, redox reactions can be used to generate electricity in electrochemical cells.
