Oxidizing and Reducing Agents AP Chemistry

O.A. stands for oxidizing agent (being reduced), R.A. for reducing agent (being oxidized).
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O.A. Permanganate, MnO4⁻, in acid (purple)→
Mn²⁺ (colorless)
O.A. Permanganate, MnO4⁻, in neutral or basic solution→
MnO₂ (brown)
O.A. Manganese dioxide, MnO₂, in acid→
Mn²⁺
O.A. HNO₃, concentrated→
NO₂ (brown gas)
O.A. HNO₃, dilute→
NO (colorless gas)
O.A. H₂SO₄, hot, concentrated→
SO₂ (colorless, choking gas)
O.A. Metal-ic ions (e.g. Sn⁴⁺)→
Metal-ous ions (e.g. Sn²⁺)
O.A. Free halogens (e.g. Cl₂)→
Halide ions (e.g. Cl⁻)
O.A. Peroxides Na₂O₂, H₂O₂→
Hydroxides NaOH, HOH
O.A. Perchloric acid, HClO₄→
Cl⁻
O.A. Dichromate, Cr₂O₇²⁻, in acid (orange)→
Cr³⁺ (green or blue)
O.A. Dichromate, Cr₂O₇²⁻, in base→
CrO₄²⁻
R.A. Free halogens in dilute basic solution (e.g. Br₂)→
Hypohalite ions (e.g. BrO⁻)
R.A. Free halogens in concentrated basic solution (e.g. Cl₂)→
Halite ions (e.g. ClO₂⁻)
R.A. Nitrite ions, NO₂⁻→
Nitrate ions, NO₃⁻
R.A. Sulfite ions, SO₃²⁻ or SO₂(aq)→
Sulfate ions, SO₄²⁻
R.A. Metal-ous ions (e.g. Fe²⁺)→
Metal-ic ions (e.g. Fe³⁺)
R.A. Halide ions (e.g. Br⁻)→
Free halogens (e.g. Br₂)
R.A. Free metals (e.g. Na)→
Metal ions (e.g. Na⁺)
R.A. H₂O₂→
O₂
R.A. C₂O₄²⁻→
CO₂