Chemistry Chemistry Practice Problems Solutions Library

Redox Reactions Solutions Library

Access 229 Redox Reactions video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Redox Reactions learn videos.

Browse Solutions

229 solutions

Redox Reactions

Q. Which of the following chemical reactions is an oxidation-reduction reaction?a) Zn + S → ZnSb) H2SO4 + 2 NaOH → Na2SO4 H2Oc) CO2 + H2O → H2CO3d) Ag...

Solved • Feb 1, 2021

Redox Reactions

Q. Which of the following reagents would oxidize Cr to Cr2+, but not Pb to Pb2+? a) Br- b) Co2+ c) Ca2+ d) Br2 e) Ca f) Co

Solved • Jan 27, 2021

Redox Reactions

Q. Explain how to Identify the reducing agent in a reaction of magnesium with oxygen.

Solved • Jan 26, 2021

Redox Reactions

Q. For the following reaction KClO2 →  KCl + O2Assign oxidation states to each element on each side of the equation.Which element is oxidized?Which el...

Solved • Nov 16, 2020

Redox Reactions

Q. For the given reactions, classify the reactants as the reducing agent, oxidizing agent, or neither. 2 S + O2 → 2 SO3

Solved • Nov 12, 2020

Redox Reactions

Q. 1) Identify the oxidizing agent and the reducing agent for Ba(s)+Cl2(g)→BaCl2(s) .Express your answers as chemical formulas separated by a comma.ox...

Solved • Oct 21, 2020

Redox Reactions

Q. Explain how to identify the reducing agent in a reaction of magnesium with oxygen.

Solved • Oct 20, 2020

Redox Reactions

Q. For the given reactions, classify the reactants as the reducing agent, oxidizing agent, or neither.F2 + H2 → 2 HF2 Mg + O2 → 2 MgOA chemical reacti...

Solved • Jul 2, 2020

Redox Reactions

Q. Which substance is the reducing agent in this reaction?2 Cr(OH)3 + 3 OCl− + 4 OH− → 2 CrO4−2 + 3 Cl− + 5 H2OExpress your answer as a chemical formu...

Solved • Jul 2, 2020

Redox Reactions

Q. Which element is reduced in this reaction?2 Cr(OH)3 + 3 OCl− + 4 OH− → 2 CrO4−2 + 3 Cl− + 5 H2OEnter the chemical symbol of the element.Oxidation-r...

Solved • Jul 2, 2020

Redox Reactions

Q. True or false.  Drag the terms on the left to the appropriate blanks on the right.

Solved • Jun 30, 2020

Redox Reactions

Q. Zinc reacts with hydrochloric acid according to the reaction equation Zn (s)+2 HCl (aq) → ZnCl2 (aq) + H2(g)Identify the oxidizing agent.a. HCl (aq...

Solved • Jun 25, 2020

Redox Reactions

Q. Write the equation for the reaction of calcium and oxygen. Write the oxidation numbers for both the reactants and the products. What is the reducin...

Solved • Jun 16, 2020

Redox Reactions

Q. What is the reducing agent in the following reaction? 2K + S → K2S A) KB) SC) K2SD) None of the above

Solved • Jun 16, 2020

Redox Reactions

Q. Ag → Ag+ +1 e- This equation represents the type of reaction called A) hydrolysisB) oxidationC) redoxD) reduction

Solved • Jun 16, 2020

Redox Reactions

Q. In the reaction of beryllium with fluorine, which atom is oxidized? A) fluorineB) berylliumC) neither of themD) both of them

Solved • Jun 16, 2020

Redox Reactions

Q. What are transferred in an oxidation-reduction reaction? *A) atomsB) electronsC) ionsD) protons

Solved • Jun 16, 2020

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent in each of the following.8 H+(aq) + 6 Cl-(aq) + Sn(s) + 4 NO3-(aq) → SnCl62-(aq) + 4 NO2(g) + 4...

Solved • Jun 16, 2020

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent in each of the following.2 MnO4-(aq) + 10 Cl-(aq) + 16 H+(aq) → 5 Cl2(g) + 2Mn2+(aq) + 8 H2O(l)

Solved • Jun 16, 2020

Redox Reactions

Q. solveCl2(g) + 2LiBr(aq) → 2LiCl(aq) + Br2(l)a) Cl (in Cl2) is oxidized; Cl2 is the reducing agent. Br− (in LiBr) is reduced; LiBr is the oxidizing ...

Solved • Apr 29, 2020

Redox Reactions

Q. Which of the following would not be a redox reaction?A. the combustion of a hydrocarbon in oxygen gasB. the reaction that occurs when aqueous calci...

Solved • Apr 29, 2020

Redox Reactions

Q. Answer the following questions about the reaction of iron (III) oxide with carbon monoxide.a. Write the balanced reaction between iron (III) oxide ...

Solved • Apr 28, 2020

Redox Reactions

Q. The removal of the alcohol seen in the conversion of the nasal decongestant pseudoephedrine to the illicit drug methamphetamine (alluded in the hit...

Solved • Apr 28, 2020

Redox Reactions

Q. Which of the following reactions are redox reactions?Check all that apply. a) Al(s)+3Ag+(aq) = Al3+(aq)+3Ag(s)b) SO3(g)+H2O(l) = H2SO4(aq)c) Ba(s)+...

Solved • Apr 27, 2020

Redox Reactions

Q. Consider the following reaction and select the false statement below.NaI + 3HOCl → NaIO3 + 3HClA. HOCl is the oxidizing agentB. Cl is reducedC. NaI...

Solved • Mar 30, 2020

Redox Reactions

Q. Classify each of the following as a redox reaction or a non-redox reaction. 2CO + O2 → 2CO2 SO3 + H2O →H2SO4 Zn + CuCl2 → ZnCl2 + Cu HCl + NaOH → H...

Solved • Mar 20, 2020

Redox Reactions

Q. Identify the oxidizing and reducing agents.Cr2O2−7(aq)+I−(aq)→Cr3+(aq)+IO−3(aq) (acidic solution)Express your answers as chemical expressions separ...

Solved • Mar 17, 2020

Redox Reactions

Q. Which element is oxidized in the reaction below?Fe(CO)5 (l) + 2HI (g) → Fe(CO)4I2 (s) + CO (g) + H2 (g)A) HB) CC) FeD) IE) O

Solved • Feb 6, 2020

Redox Reactions

Q. Identify the reducing agent in the following reaction:2 MnO−4 + 10 Cl− + 16 H+ → 5 Cl2 + Mn2+ + 8 H2O(A) Cl−(B) MnO−4(C) Cl2(D) Mn2+ (E) H+

Solved • Nov 28, 2019

Redox Reactions

Q. Which of the following are oxidation-reduction reactions?I. PCl3 + Cl2 → PCl5II. Cu + 2AgNO3 → Cu(NO3)2 + 2AgIII. CO2 + 2LiOH → Li2CO3 + H2OIV. FeC...

Solved • Nov 21, 2019

Redox Reactions

Q. What is the reducing agent in the following reaction?5 Fe2+(aq) + MnO4-(aq) + 8 H+(aq) → 5 Fe3+(aq) + Mn2+(aq) + 4 H2O(I)A. MnO4-B. Fe3+C. Mn2+D. F...

Solved • Oct 3, 2019

Redox Reactions

Q. Consider the following reaction below in which pure iron is produced from iron(III) oxide in a blast furnace:          3 CO (g) + Fe2O3 (g) → 2 Fe ...

Solved • Sep 13, 2019

Redox Reactions

Q. Indicate whether the following balanced equations involve oxidation-reduction. If they do, identify the elements that undergo changes in oxidation ...

Solved • Aug 30, 2019

Redox Reactions

Q. Indicate whether the following balanced equations involve oxidation-reduction. If they do, identify the elements that undergo changes in oxidation ...

Solved • Aug 30, 2019

Redox Reactions

Q. What happens when you add zinc to a solution of copper sulfate? Identify the half reactions to see what got oxidized and reduced.

Solved • Aug 25, 2019

Redox Reactions

Q. In the reaction Mg(s) + 2HCl(aq) → MgCl 2(aq) + H2(g), what role does magnesium play?

Solved • Aug 7, 2019

Redox Reactions

Q. Complete and balance the following equations, and identify the oxidizing and reducing agents.Part AMnO4−(aq) + CH3OH(aq) → Mn2+(aq) + HCO2H(aq) (ac...

Solved • Aug 6, 2019

Redox Reactions

Q. In an oxidation-reduction reaction, the substance oxidized always a. shows a gain of electrons b. takes on oxygen atoms c. becomes a charged specie...

Solved • Aug 5, 2019

Redox Reactions

Q. HNO2 is an oxidizing agent or a reducing agent?

Solved • Aug 5, 2019

Redox Reactions

Q. Which of the following is an oxidation-reduction reaction?a. Cu(s) + 2AgNO3(aq) → 2Ag(s) + Cu(NO3)2(aq)b. HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)c. ...

Solved • Aug 2, 2019

Redox Reactions

Q. Which element is reduced in this reaction?Cr2O72− + 3HNO2 + 5H+ → 2Cr3+ + 3NO3− + 4H2OEnter the chemical symbol of the element.

Solved • Jul 10, 2019

Redox Reactions

Q. 1. A beaker of nitric acid is neutralized with calcium hydroxide. Express your answer as a chemical equation. Identify all of the phases in your an...

Solved • Jul 10, 2019

Redox Reactions

Q. Complete and balance the following equations, and identify the oxidizing and reducing agents.Part ACr2O72−(aq) + I −(aq) → Cr 3+(aq) + IO3−(aq) (ac...

Solved • Jul 9, 2019

Redox Reactions

Q. For the given reactions, classify the reactants as the reducing agent, oxidizing agent, or neither.F2 + H2 → 2HF2Mg + O2 → 2MgODrag the appropriate...

Solved • Jul 9, 2019

Redox Reactions

Q. Which species is the oxidizing agent in the reaction shown? Fe(s) + PbCl2(aq) → FeCl2(aq) + Pb(s)a. ironb. lead(II) ionc. iron(II) iond. lead

Solved • Jul 9, 2019

Redox Reactions

Q. Titration of an acidic solution of Na2C2O4 with KMnO4(aq).The balanced chemical equation for this reaction is:16 H+(aq) + 2 MnO4-(aq) + 5 C2O42-(aq...

Solved • Jan 3, 2019

Redox Reactions

Q. Titration of an acidic solution of Na2C2O4 with KMnO4(aq). The balanced chemical equation for this reaction is: 16 H+(aq) + 2 MnO...

Solved • Jan 3, 2019

Redox Reactions

Q. What is the reducing agent in the following reaction?2 Br-(aq) + H2O2(aq) + 2 H+(aq)  →  Br2(aq) + 2 H2O(l)

Solved • Jan 3, 2019

Redox Reactions

Q. The Haber process is the principal industrial route for converting nitrogen into ammonia:N2 (g) + 3H2 (g)  →  2NH3 (g).What is being oxidized, and ...

Solved • Jan 3, 2019

Redox Reactions

Q. Hydrazine (N2H4) and dinitrogen tetroxide (N2O4) form a self-igniting mixture that has been used as a rocket propellant. The reaction products are ...

Solved • Jan 3, 2019

Redox Reactions

Q. S4O62−(aq) + 2I−(aq) ⟶ I2(s) + S2O32−(aq)        ΔG° = 87.8 kJ/mol(a) Identify the oxidizing and reducing agents.

Solved • Nov 30, 2018

Redox Reactions

Q. Identify the species oxidized, species reduced, and the oxidizing agent and reducing agent for all the reactions in the previous problem.(a) Al(s) ...

Solved • Nov 29, 2018

Redox Reactions

Q. Consider the following balanced redox reaction:2CrO2−(aq) + 2H2O(l) + 6ClO−(aq) ⟶ 2CrO42−(aq) + 3Cl2(g) + 4OH−(aq)(d) Which species is the reducing...

Solved • Nov 27, 2018

Redox Reactions

Q. Consider the following balanced redox reaction:16H+ (aq) + 2MnO4− (aq) + 10Cl − (aq) ⟶ 2Mn 2+ (aq) + 5Cl 2 (g) + 8H2O (l)(a) Which species is being...

Solved • Nov 27, 2018

Redox Reactions

Q. Potassium superoxide, KO2, is often used in oxygen masks (such as those used by firefighters) because KO2 reacts with CO2 to release molecular oxyg...

Solved • Nov 12, 2018

Redox Reactions

Q. Gold is isolated from rocks by reaction with aqueous cyanide, CN-: 4 Au(s) + 8 NaCN(aq) + O2(g) + H2O(l)  →  4 Na[Au(CN)2](aq) + 4 NaOH(aq)Which at...

Solved • Oct 31, 2018

Redox Reactions

Q. You may want to reference (Pages 145 - 148) Section 4.5 while completing this problem.The commercial production of nitric acid involves the followi...

Solved • Oct 31, 2018

Redox Reactions

Q. You may want to reference (Pages 145 - 148) Section 4.5 while completing this problem.The commercial production of nitric acid involves the followi...

Solved • Oct 31, 2018

Redox Reactions

Q. You may want to reference (Pages 145 - 148) Section 4.5 while completing this problem.The commercial production of nitric acid involves the followi...

Solved • Oct 31, 2018

Redox Reactions

Q. You may want to reference (Pages 145 - 148) Section 4.5 while completing this problem.The commercial production of nitric acid involves the followi...

Solved • Oct 31, 2018

Redox Reactions

Q. The accompanying photo shows the reaction between a solution of Cd(NO3)2 and one of Na2S. Is this a redox reaction?

Solved • Oct 31, 2018

Redox Reactions

Q. You may want to reference (Pages 137 - 144)Section 4.4 while completing this problem.Which of the following statements is true about the reaction b...

Solved • Oct 31, 2018

Redox Reactions

Q. Uranium hexafluoride, UF6, is processed to produce fuel for nuclear reactors and nuclear weapons. UF6 is made from the reaction of elemental uraniu...

Solved • Oct 31, 2018

Redox Reactions

Q. True or false.(a) If a substance is oxidized, it is gaining electrons.

Solved • Oct 31, 2018

Redox Reactions

Q. Complete the sentences to explain why each statement is true or false.(a) Oxidation can occur without oxygen.

Solved • Oct 31, 2018

Redox Reactions

Q. Explain how a redox reaction involves electrons in the same way that an acid-base reaction involves protons.

Solved • Oct 31, 2018

Redox Reactions

Q. You may want to reference (Pages 138 - 144) Section 4.4 while completing this problem.Which of the following are redox reactions? (a) P4(s) + 10HCl...

Solved • Oct 31, 2018

Redox Reactions

Q. You may want to reference (Pages 138 - 144) Section 4.4 while completing this problem.For those reactions that are redox, indicate which elements a...

Solved • Oct 31, 2018

Redox Reactions

Q. For those reactions that are redox, indicate which elements are reduced.P4(s) + 10 HClO(aq) + 6H2O(l)  →  H3PO4(aq) + 10HCl(aq)

Solved • Oct 31, 2018

Redox Reactions

Q. Which element is oxidized and which is reduced in the following reactions?N2(g) + 3 H2(g) → 2 NH3(g)

Solved • Oct 31, 2018

Redox Reactions

Q. Which element is oxidized and which is reduced in the following reactions?3 Fe(NO3)2(aq) + 2 Al(s) → 3 Fe(s) + 2 Al(NO3)3(aq)

Solved • Oct 31, 2018

Redox Reactions

Q. Which element is oxidized and which is reduced in the following reactions?Cl2(aq) + 2 NaI(aq) → I2(aq) + 2 NaCl(aq)

Solved • Oct 31, 2018

Redox Reactions

Q. Which element is oxidized and which is reduced in the following reactions?PbS(s) + 4 H2O2(aq) → PbSO4(s) + 4 H2O(l)

Solved • Oct 31, 2018

Redox Reactions

Q. Give the best definition of a redox (non-combustion) reaction.

Solved • Oct 31, 2018

Redox Reactions

Q. Give an example of a redox (noncombustion) reaction.A. HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)B. H2SO4(aq) + Li2S(aq) → H2S(g) + Li2SO4(aq)C. CH4(g)...

Solved • Oct 31, 2018

Redox Reactions

Q. Consider the reaction:Zn(s) + Fe2+(aq) → Zn2+(aq) + Fe(s)What is being oxidized?

Solved • Oct 31, 2018

Redox Reactions

Q. Consider the reaction:Zn(s) + Fe2+(aq) → Zn2+(aq) + Fe(s)What is being reduced?

Solved • Oct 31, 2018

Redox Reactions

Q. Consider the reaction:Zn(s) + Fe2+(aq) → Zn2+(aq) + Fe(s)Which is the oxidizing agent?

Solved • Oct 31, 2018

Redox Reactions

Q. Consider the reaction:Zn(s) + Fe2+(aq) → Zn2+(aq) + Fe(s)Which is the reducing agent?

Solved • Oct 31, 2018

Redox Reactions

Q. Indicate which reactions are redox reactions.(a) Hg2(NO3)2(aq) + 2 KBr(aq) → Hg2Br2(s) + 2 KNO3(aq)(b) 4 Al(s) + 3 O2(g) → 2 Al2O3(s)(c) CaO(s) + C...

Solved • Oct 31, 2018

Redox Reactions

Q. Identify which element is oxidized and which is reduced in the following reaction:4 Al(s) + 3 O2(g) → 2 Al2O3(s)

Solved • Oct 31, 2018

Redox Reactions

Q. Use oxidation states to identify the element that is being oxidized in the following redox reaction:Sn(s) + 4HNO3(aq) → SnO2(s) + 4NO2(g) + 2H2O(g)

Solved • Oct 31, 2018

Redox Reactions

Q. Use oxidation states to identify the element that is being reduced in the following redox reaction:Sn(s) + 4HNO3(aq) → SnO2(s) + 4NO2(g) + 2H2O(g)

Solved • Oct 31, 2018

Redox Reactions

Q. Indicate which reactions are redox reactions.(a) 2 Li(s) + Cl2(g) → 2 LiCl(s)(b) 2 Al(s) + 3 Sn2+(aq) → 2 Al3+(aq) + 3 Sn(s)(c) Pb(NO3)2(aq) + 2 Li...

Solved • Oct 31, 2018

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent for the following reaction:2Li(s) +Cl2(g) → 2LiCl(s)

Solved • Oct 31, 2018

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent for the following reaction:2Al(s) + 3Sn2+(aq) → 2Al3+(aq) + 3Sn(s)

Solved • Oct 31, 2018

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent for the following reaction:C(s) + O2(g) → CO2(g)

Solved • Oct 31, 2018

Redox Reactions

Q. Which of the following reactions are redox reactions?a. Al(s) + 3 Ag+(aq) → Al3+(aq) + 3 Ag(s)b. SO3(g) + H2O(l) → H2SO4(aq)c. Ba(s) + Cl2(g) → BaC...

Solved • Oct 31, 2018

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent for each reaction:a. Al(s) + 3 Ag+(aq) → Al3+(aq) + 3 Ag(s)b. SO3(g) + H2O(l) → H2SO4(aq)c. Ba(...

Solved • Oct 31, 2018

Redox Reactions

Q. Sodium reacts with water according to the reaction:2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g)Identify the oxidizing agent.

Solved • Oct 31, 2018

Redox Reactions

Q. Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold.Identify the oxidizing agent in this reaction.

Solved • Oct 31, 2018

Redox Reactions

Q. Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold.Identify the reducing agent in this reaction.

Solved • Oct 31, 2018

Redox Reactions

Q. Which of the following reactions are redox reactions?a. 4 Li(s) + O2(g) → 2 Li2O(s)b. Mg(s) + Fe2+(aq) → Mg2+(aq) + Fe(s)c. Pb(NO3)2(aq) + Na2SO4(a...

Solved • Oct 31, 2018

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent for 4Li(s) + O2(g) → 2Li2O(s).

Solved • Oct 31, 2018

Redox Reactions

Q. Identify the oxidizing agent and the reducing agent for Mg(s) + Fe2+(aq) → Mg2+(aq) + Fe(s).

Solved • Oct 31, 2018

Redox Reactions

Q. How can oxidation states be used to identify redox reactions?

Solved • Oct 31, 2018

Redox Reactions

Q. What happens to a substance when it becomes oxidized? Reduced?

Solved • Oct 31, 2018

Redox Reactions

Q. In a redox reaction, which reactant is the oxidizing agent? The reducing agent?

Solved • Oct 31, 2018

Redox Reactions

Q. What is an oxidation-reduction reaction?

Solved • Oct 31, 2018

Redox Reactions

Q. Give an example of an oxidation-reduction reaction

Solved • Oct 31, 2018