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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Assign oxidation numbers to all elements in the compound H2SO4.
Balance the following redox reaction in acidic solution: Fe2+ + Cr2O72- → Fe3+ + Cr3+
Calculate the change in oxidation number of sulfur in the reaction: SO2 + 2H2O2 → H2SO4 + H2O
Calculate the number of electrons transferred when 2 moles of Fe2+ are oxidized to Fe3+.
Assign oxidation numbers to all elements in the compound H2SO4.
Balance the following redox reaction in acidic solution: Fe2+ + Cr2O72- → Fe3+ + Cr3+
Calculate the change in oxidation number of sulfur in the reaction: SO2 + 2H2O2 → H2SO4 + H2O
Calculate the number of electrons transferred when 2 moles of Fe2+ are oxidized to Fe3+.
Which of the following ions can act as both an oxidizing and a reducing agent in aqueous solution? (1) NO3- (2) SO42- (3) H2O2 (4) Cl-
Which of the following is a correct example of a disproportionation reaction in aqueous solution? (1) 2H2O2 → 2H2O + O2 (2) Zn + CuSO4 → ZnSO4 + Cu (3) Fe2+ + Cl2 → Fe3+ + 2Cl- (4) 2Na + 2H2O → 2NaOH + H2
Which of the following is NOT a redox reaction? (1) Zn + 2HCl → ZnCl2 + H2 (2) AgNO3 + NaCl → AgCl + NaNO3 (3) 2Fe3+ + 2I- → 2Fe2+ + I2 (4) 2H2O2 → 2H2O + O2
Which of the following is the correct balanced equation for the reaction between Cl2 and I- in aqueous solution? (1) Cl2 + 2I- → 2Cl- + I2 (2) Cl2 + I- → 2Cl- + I2 (3) Cl2 + 2I- → Cl- + I2 (4) Cl2 + 2I- → 2Cl- + 2I2
Fill in the blank: In the reaction 2Fe3+ + 2I- → 2Fe2+ + I2, Fe3+ is __________ and I- is __________.
Fill in the blank: In the reaction 2Na + 2H2O → 2NaOH + H2, sodium is __________ and water is __________.
Fill in the blank: In the reaction between chlorine gas and potassium iodide in aqueous solution, chlorine acts as the __________ agent.
Fill in the blank: In the standard hydrogen electrode, the reduction half-reaction is 2H+ + 2e- → __________.
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 in oxidation equals the total number of electrons gained in reduction.
True or False: In aqueous solutions, the presence of acid or base can affect the products of a redox reaction.
True or False: In aqueous solutions, the solvent (water) can participate in redox reactions.
