4.4 Classifying Chemical Reactions Redox - Revised

in redox reactions, the species that is reduced is also the __ - select all that apply: oxidizing agent reducing agent reductant oxidant

oxidizing agent, oxidant

identify the reducing agent in the following reaction: Hg2+ + Fe -> Hg2 + Fe3+ Hg2+ Fe Hg2 Fe3+

Fe

2 Li + S -> Li2S is a redox reaction. identify which of the following is the oxidizing agent and its change in oxidation number? Li is the reducing agent, oxidation change from 0 to 2+ S is the reducing agent, oxidation change from 0 to 2+ Li is the reducing agent, oxidation change from 0 to 2- S is the reducing agent, oxidation change from 0 to 2-

S is the reducing agent, oxidation change from 0 to 2-

identify the oxidizing agent in the following reaction: Cr+ + Sn4+ -> Cr3+ + Sn2+ Cr+ Sn4+ Cr3+ Sn2+

Sn4+

2 Sr + O2 -> 2 SrO is a redox reaction. which of the following is the reducing agent and its change in oxidation number? O is the reducing agent, oxidation change from 0 to 2+ Sr is the reducing agent, oxidation change from 0 to 2+ O is the reducing agent, oxidation change from 0 to 2- Sr is the reducing agent, oxidation change from 0 to 2-

Sr is the reducing agent, oxidation change from 0 to 2+

what is the oxidation number of lead (Pb) in the molecule PbO2? +1 +2 +3 +4

+4

which species is being oxidized in the following reaction? 2 As + 3 Cl2 -> 2 AsCl3 As Cl2 AsCl3 As and Cl2

As

which of the following acts as a reductant in the following reaction? H2 (g) + Cl2 (g) -> 2 HCl (g) H2 (g) Cl2 (g) HCl (g) none of the above

H2 (g)

in which compound does oxygen have an oxidation number other than -2? CO2 H2O H3PO4 H2O2

H2O2

what is occurring in the following reaction: NaBr + Cl2 -> NaCl + Br2 sodium is oxidized chlorine is oxidized bromine is reduced chlorine is reduced

chlorine is reduced

in redox reactions, the reactant that is oxidized is also called the __ - select all that apply: oxidizing agent reducing agent reductant oxidant

reducing agent, reductant

the __ of an atom or molecule __ when it undergoes reduction oxidation number, increases oxidation number, decreases charge, increases charge, decreases

oxidation number, decreases