For the reaction given, respond to the questions below. 2Fe^2+ (aq) + I_2(aq) ri

Question

For the reaction given, respond to the questions below. 2Fe^2+ (aq) + I_2(aq) rightarrow 2Fe^3- _(aq) + 2I^-_(aq) a. Label the oxidation state of each substance, writing its number below each atom, on both sides of the equation. b. Is Fe^2- oxidized or reduced? c. Is I in I_2 oxidized or reduced? ___ For the following reaction, answer the questions below. 2Mn^2+ _(aq) + 5O_2(g) + 8H_2O_(g) rightarrow 2MnO_4(aq) + 5H_2O_2(aq) + 6H_(aq) a. Is H_2O_2 a reducing agent? ___ b. Is H_2O_2, an oxidizing agent? c. What is the oxidation number of Mn on the left side of the equation? ___ d. What is the oxidation number of Mn on the right side of the equation? ___ e. In this reaction, does Mn undergo oxidation or reduction? ___ For the following reaction, which occurs in a nickel-cadmium battery: Cd_(s) + NiO_2(s) + 2H_2O_(1) rightarrow Cd(OH)_2(s) + Ni(OH)_2(s)

Explanation / Answer

1)

a)

oxidation state of Fe in Fe2+ is +2

oxidation state of I in I2 is +0

oxidation state of Fe in Fe3+ is +3

oxidation state of I in I- is -1

b)

Fe2+ is oxidised

Since oxidation state of Fe changes from +2 to +3

c)

I in I2 is reduced

Since oxidation state of I changes from 0 to -1

I am allowed to answer only 1 question at a time

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