In the substance O2, each oxygen has an oxidation number of

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Which of the following is an oxidation reduction (redox) reaction?  1. MgCl2 (aq) + Pb(NO3)2 (aq) = Mg(NO3)2 (aq) + PbCl2(s) 2. 2 Zn (s) + FeCl2 (aq) = Fe (s) + 2 ZnCl2 (aq) 3. 2 H2SO4 (aq) + NaOH (s) = 2H2O (l) + Na2SO4 (aq) 4. Na3PO4 (aq) + FeCl3 (aq) = 3NaCl (aq) + FePO4 (s)

In the following oxidation-reduction reaction, what is being oxidized? C4H8 + 6 02 → 4 CO2 + 4 H20 O CO2 O C4H8 O H2O

For each of the following reactions, identify the elements that are oxidized and reduced, the oxidizing and reducing agents, and how many moles of electrons are transferred in the overall reaction. a. 4Fe(s) + 302(g) → 2Fe2O3(s) b. 2Ag(s) + H2S(g) → Ag2S(s) + H2(g) c. 2 Al(s) + 3 CuCl2(aq) → 2 AlCl3(aq) + 3 Cu(s) d. 2NaHCO3(s) → Na2CO3(s) + H20(1) + CO2(g) e. CH4(g) + 2 02(g) → CO2(g) + 2H2O(1)

Assign oxidation states to all of the species in the following redox reaction. For the reactants, also identify electron loss or gain, the species oxidized, the species reduced, the oxidizing agent and the reducing agent. Oxidation state Electron gain/loss Oxidized or reduced Reducing or oxidizing agent Mg(s) ♥ ↑ ↑ ♥ + Hg²+ (aq) ♥ ↑ ↑ ♥ Mg2+ (aq) + Hg(1) ◊ Total number of electrons transferred from the reducing agent to the oxidizing agent for the equation given is:

In the reaction 2Zn + Cl2 →2ZNCI the oxidation number of Zn change 4 from 0 to +1 from +1 to +2 O from +1 to 0

The hydroperoxide ion, HO2–(aq), reacts with permanganate ion, MnO4–(aq) to produce MnO2(s) and oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2(g) by permanganate ion in a basic solution.