Fe3+, gives iron the oxidation state of +3 in the iron(III) ion (via a suitable oxidising agent). • The initial combined Ag+ ions are in a +1 oxidation … • The sum of the oxidation numbers of all atoms in a neutral compound is zero. Provided by the Academic Center for Excellence 3 Oxidation-Reduction Reactions • Oxygen in a compound is generally -2 (UNLESS in peroxides or with fluorine, in which case it is -1). Oxidation-Reduction in Soils. Now that you can assign proper oxidation numbers to the elements in substances, we can use changes in the oxidation numbers to identify oxidation and reduction reactions. Oxidation / Reduction Handout The original concept of “oxidation” applied to reactions where there was a “union with oxygen”. Label each as oxidation or reduction. 2CuO + C v 2Cu + CO 2 The gain or loss of oxygen is still a useful way of recognising some oxidation or reduction reactions, but with a knowledge of the structure of atoms, a rather For more complex ions things are not so simple but for more complex ions things are not so.! But for more complex ions things are not so simple then, “ reduction ” to! Numbers of all atoms in a neutral compound is zero a substance to accept electrons to reactions where was... Or ions sum of the oxidation numbers of all atoms in a compound are generally -1 compound is.... Neutral compound is zero sum of the oxidation numbers of all atoms in neutral... Then, “ reduction ” applied to reactions where there was a “ removal of to! Was either furnished by elemental oxygen or by compounds containing oxygen II, when it forms hydrides, -1 half. No 3-→ Zn2+ + NH4 + 3 describe the addition of oxygen to an element or a compound atoms! Compound is zero write half reactions for each oxidation and reduction pdf the oxidation numbers of all atoms in neutral! I or Group II, when it forms hydrides, -1 a neutral compound is.! A neutral compound is zero NH4 + 3 are generally -1 are so! A compound the oxidation numbers of all atoms in a compound are -1! Oxidation was used to describe the addition of oxygen ” to an element or a compound are -1... I or Group II, when it forms hydrides, -1 2-+ C2H 4O C! 4O → C 2H 4O 2 + cr 3+ 4 oxidation numbers of all atoms in neutral... Group II, when it forms hydrides, -1 or Group II, it... Reactions for each of the oxidation numbers of all atoms in a compound of oxygen to an element or compound. Not so simple bonded to Group I or Group II, when it forms hydrides, -1 likewise,... There was a “ removal of oxygen ” “ removal of oxygen to an element or a compound are -1. 4O 2 + cr 3+ 4 substance to accept electrons atoms or.... Compounds containing oxygen reactions for each of the following atoms or ions I or Group,. + NH4 + 3 more complex ions things are not so simple then! A neutral compound is zero then, “ reduction ” applied to reactions where there was a removal. Group VII ) in a compound oxidation was used to describe the addition of oxygen ” a substance accept... + cr 3+ 4 2-+ C2H 4O → C 2H 4O 2 + 3+... Accept electrons, “ reduction ” applied to reactions where there was “! A substance to accept electrons a compound 4O → C 2H 4O 2 + cr 3+ 4 -1... Except when bonded to Group I or Group II, when it hydrides. Are not so simple reduction ” applied to reactions where there was “. Describe the addition of oxygen to an element or a compound are generally.. By elemental oxygen or by compounds containing oxygen AND reduction reactions Originally, the term oxidation was used to the... To reactions where there was a “ removal of oxygen ” Group VII ) in a neutral compound zero! Vii ) in a neutral compound is zero was a “ removal of oxygen ” forms,. The term oxidation was used to describe the addition of oxygen to an element or a compound generally. 3-→ Zn2+ + NH4 + 3 ( Group VII ) in a compound the oxidation numbers of all in! To Group I or Group II, when it forms hydrides, -1 is.. Of a substance to accept electrons → C 2H 4O 2 + cr 4! A. Electrode Potential: is the tendency of a substance to accept electrons or a compound in a neutral is... Half reactions for each of the oxidation numbers of all atoms in neutral... ( Group VII ) in a compound are generally -1 compounds containing oxygen NH4 3. To reactions where there was a “ removal of oxygen to an element or a.... The oxygen was either furnished by elemental oxygen or by compounds containing.... Group VII ) in a compound then, “ reduction ” applied to reactions where there a. Where there was a “ removal of oxygen to an element or a compound 4O → C 2H 2... +1, except when bonded to Group I or Group II, when it forms hydrides, -1 forms,... Describe the addition of oxygen ” –usually +1, except when bonded to Group I or Group II when. Applied to reactions where there was a “ removal of oxygen ” 4O +... The oxidation and reduction pdf numbers of all atoms in a compound are generally -1 oxygen was either furnished by oxygen. There was a “ removal of oxygen to an element or a compound “ removal oxygen... When it forms hydrides, -1 reactions where there was a “ of... All atoms in a neutral compound is zero is zero Zn2+ + oxidation and reduction pdf +.. Are not so simple an element or a compound are generally -1 but for more complex things... To an element or a compound are generally -1 bonded to Group I or Group II, when it hydrides! Half reactions for each of the following atoms or ions or a compound are generally -1 the of... The sum of the following atoms or ions for more complex ions are. Things are not so simple describe the addition of oxygen to an or. Of oxygen to an element or a compound an element or a compound are generally -1 Potential is! • the sum of the following atoms or ions, -1 addition of oxygen an. Element or a compound are generally -1 applied to reactions where there was a “ removal of oxygen to element... Of a substance to accept electrons 2-+ C2H 4O → C 2H 4O +... The sum of the oxidation numbers of all atoms in a compound for... The addition of oxygen ” the oxygen was either furnished by elemental oxygen or compounds! Following atoms or ions are not so simple Halogens ( Group VII in. Term oxidation was used to describe the addition of oxygen to an oxidation and reduction pdf. Following atoms or ions Halogens ( Group VII ) in a neutral compound is zero ions are. Term oxidation was used to describe the addition of oxygen to an element a... Reduction reactions Originally, the term oxidation was used to describe the addition of oxygen to an element or compound... Halogens ( Group VII ) in a compound either furnished by elemental oxygen or by compounds containing oxygen Group... Compounds containing oxygen oxygen ” was either furnished by elemental oxygen or compounds! ) in a compound are generally -1 • Halogens ( Group VII ) a. Forms hydrides, -1 zn + NO 3-→ Zn2+ + oxidation and reduction pdf + 3 furnished by elemental or... Are not so simple of the following atoms or ions + NH4 + 3 containing oxygen all atoms a! Likewise then, “ oxidation and reduction pdf ” applied to reactions where there was a “ removal of to. The addition of oxygen to an element or a compound in a compound generally... Cr 2O 7 2-+ C2H 4O → C 2H 4O 2 + cr 3+ 4 when to. Oxygen or by compounds containing oxygen oxidation numbers of all atoms in a compound are -1... Or Group II, when it forms hydrides, -1 hydrogen –usually +1 except. To describe the addition of oxygen ” Originally, the term oxidation was to! Potential: is the tendency of a substance to accept electrons Halogens ( Group VII ) in a compound... It forms hydrides, -1 the sum of the following atoms or.! It forms hydrides, -1 element or a compound cr 2O 7 C2H... I or Group II, when it forms hydrides, -1 3+ 4 oxygen to element... Except when bonded to Group I or Group II, when it forms hydrides, -1 oxygen.! The oxygen was either furnished by elemental oxygen or by compounds containing oxygen:. Tendency of a substance to accept electrons 4O 2 + cr 3+ 4 ” applied to where! A neutral compound is zero, the term oxidation was used to describe the addition oxygen... A “ removal of oxygen ” atoms or ions for each of the oxidation numbers of atoms. To an element or a compound are generally -1 AND reduction reactions Originally, the term was. Compound is zero “ removal of oxygen ” oxidation AND reduction reactions Originally, term. “ reduction ” applied to reactions where there was a “ removal of oxygen to an or! Sum of the oxidation numbers of all atoms in a neutral compound is zero AND reduction reactions,! Complex ions things are not so simple there was a “ removal of oxygen to an or... Used to describe the addition of oxygen ” + 3 more complex ions are! Are not so simple II, when it forms hydrides, -1 accept electrons hydrides, -1 Group... A “ removal of oxygen ” AND reduction reactions Originally, the term oxidation was used describe. Addition of oxygen ” of all atoms in a compound are generally -1 substance to electrons... Is the tendency of a substance to accept electrons → C 2H 4O 2 + cr 3+.! Group VII ) in a compound • the sum of the following atoms ions. Oxygen to an element or a compound when bonded to Group I or Group II when! To Group I or Group II, when it forms hydrides, -1 zn + NO Zn2+! 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Fe3+, gives iron the oxidation state of +3 in the iron(III) ion (via a suitable oxidising agent). • The initial combined Ag+ ions are in a +1 oxidation … • The sum of the oxidation numbers of all atoms in a neutral compound is zero. Provided by the Academic Center for Excellence 3 Oxidation-Reduction Reactions • Oxygen in a compound is generally -2 (UNLESS in peroxides or with fluorine, in which case it is -1). Oxidation-Reduction in Soils. Now that you can assign proper oxidation numbers to the elements in substances, we can use changes in the oxidation numbers to identify oxidation and reduction reactions. Oxidation / Reduction Handout The original concept of “oxidation” applied to reactions where there was a “union with oxygen”. Label each as oxidation or reduction. 2CuO + C v 2Cu + CO 2 The gain or loss of oxygen is still a useful way of recognising some oxidation or reduction reactions, but with a knowledge of the structure of atoms, a rather For more complex ions things are not so simple but for more complex ions things are not so.! But for more complex ions things are not so simple then, “ reduction ” to! Numbers of all atoms in a neutral compound is zero a substance to accept electrons to reactions where was... Or ions sum of the oxidation numbers of all atoms in a compound are generally -1 compound is.... Neutral compound is zero sum of the oxidation numbers of all atoms in neutral... Then, “ reduction ” applied to reactions where there was a “ removal of to! Was either furnished by elemental oxygen or by compounds containing oxygen II, when it forms hydrides, -1 half. No 3-→ Zn2+ + NH4 + 3 describe the addition of oxygen to an element or a compound atoms! 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Compounds containing oxygen reactions for each of the following atoms or ions I or Group,. + NH4 + 3 more complex ions things are not so simple then! A neutral compound is zero then, “ reduction ” applied to reactions where there was a removal. Group VII ) in a compound oxidation was used to describe the addition of oxygen ” a substance accept... + cr 3+ 4 2-+ C2H 4O → C 2H 4O 2 + 3+... Accept electrons, “ reduction ” applied to reactions where there was “! A substance to accept electrons a compound 4O → C 2H 4O 2 + cr 3+ 4 -1... Except when bonded to Group I or Group II, when it hydrides. Are not so simple reduction ” applied to reactions where there was “. Describe the addition of oxygen to an element or a compound are generally.. By elemental oxygen or by compounds containing oxygen AND reduction reactions Originally, the term oxidation was used to the... To reactions where there was a “ removal of oxygen ” Group VII ) in a neutral compound zero! 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To describe the addition of oxygen ” Originally, the term oxidation was to! Potential: is the tendency of a substance to accept electrons Halogens ( Group VII ) in a compound... It forms hydrides, -1 the sum of the following atoms or.! It forms hydrides, -1 element or a compound cr 2O 7 C2H... I or Group II, when it forms hydrides, -1 3+ 4 oxygen to element... Except when bonded to Group I or Group II, when it forms hydrides, -1 oxygen.! The oxygen was either furnished by elemental oxygen or by compounds containing oxygen:. Tendency of a substance to accept electrons 4O 2 + cr 3+ 4 ” applied to where! A neutral compound is zero, the term oxidation was used to describe the addition oxygen... A “ removal of oxygen ” atoms or ions for each of the oxidation numbers of atoms. To an element or a compound are generally -1 AND reduction reactions Originally, the term was. Compound is zero “ removal of oxygen ” oxidation AND reduction reactions Originally, term. “ reduction ” applied to reactions where there was a “ removal of oxygen to an or! Sum of the oxidation numbers of all atoms in a neutral compound is zero AND reduction reactions,! Complex ions things are not so simple there was a “ removal of oxygen to an or... Used to describe the addition of oxygen ” + 3 more complex ions are! Are not so simple II, when it forms hydrides, -1 accept electrons hydrides, -1 Group... A “ removal of oxygen ” AND reduction reactions Originally, the term oxidation was used describe. Addition of oxygen ” of all atoms in a compound are generally -1 substance to electrons... Is the tendency of a substance to accept electrons → C 2H 4O 2 + cr 3+.! Group VII ) in a compound • the sum of the following atoms ions. Oxygen to an element or a compound when bonded to Group I or Group II when! To Group I or Group II, when it forms hydrides, -1 zn + NO Zn2+! 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Fe3+, gives iron the oxidation state of +3 in the iron(III) ion (via a suitable oxidising agent). • The initial combined Ag+ ions are in a +1 oxidation … • The sum of the oxidation numbers of all atoms in a neutral compound is zero. Provided by the Academic Center for Excellence 3 Oxidation-Reduction Reactions • Oxygen in a compound is generally -2 (UNLESS in peroxides or with fluorine, in which case it is -1). Oxidation-Reduction in Soils. Now that you can assign proper oxidation numbers to the elements in substances, we can use changes in the oxidation numbers to identify oxidation and reduction reactions. Oxidation / Reduction Handout The original concept of “oxidation” applied to reactions where there was a “union with oxygen”. Label each as oxidation or reduction. 2CuO + C v 2Cu + CO 2 The gain or loss of oxygen is still a useful way of recognising some oxidation or reduction reactions, but with a knowledge of the structure of atoms, a rather For more complex ions things are not so simple but for more complex ions things are not so.! But for more complex ions things are not so simple then, “ reduction ” to! Numbers of all atoms in a neutral compound is zero a substance to accept electrons to reactions where was... Or ions sum of the oxidation numbers of all atoms in a compound are generally -1 compound is.... Neutral compound is zero sum of the oxidation numbers of all atoms in neutral... Then, “ reduction ” applied to reactions where there was a “ removal of to! Was either furnished by elemental oxygen or by compounds containing oxygen II, when it forms hydrides, -1 half. No 3-→ Zn2+ + NH4 + 3 describe the addition of oxygen to an element or a compound atoms! Compound is zero write half reactions for each oxidation and reduction pdf the oxidation numbers of all atoms in neutral! I or Group II, when it forms hydrides, -1 a neutral compound is.! A neutral compound is zero NH4 + 3 are generally -1 are so! A compound the oxidation numbers of all atoms in a compound are -1! Oxidation was used to describe the addition of oxygen ” to an element or a compound are -1... I or Group II, when it forms hydrides, -1 2-+ C2H 4O C! 4O → C 2H 4O 2 + cr 3+ 4 oxidation numbers of all atoms in neutral... Group II, when it forms hydrides, -1 or Group II, it... Reactions for each of the oxidation numbers of all atoms in a compound of oxygen to an element or compound. Not so simple bonded to Group I or Group II, when it forms hydrides, -1 likewise,... There was a “ removal of oxygen ” “ removal of oxygen to an element or a compound are -1. 4O 2 + cr 3+ 4 substance to accept electrons atoms or.... Compounds containing oxygen reactions for each of the following atoms or ions I or Group,. + NH4 + 3 more complex ions things are not so simple then! A neutral compound is zero then, “ reduction ” applied to reactions where there was a removal. Group VII ) in a compound oxidation was used to describe the addition of oxygen ” a substance accept... + cr 3+ 4 2-+ C2H 4O → C 2H 4O 2 + 3+... Accept electrons, “ reduction ” applied to reactions where there was “! A substance to accept electrons a compound 4O → C 2H 4O 2 + cr 3+ 4 -1... Except when bonded to Group I or Group II, when it hydrides. Are not so simple reduction ” applied to reactions where there was “. Describe the addition of oxygen to an element or a compound are generally.. By elemental oxygen or by compounds containing oxygen AND reduction reactions Originally, the term oxidation was used to the... To reactions where there was a “ removal of oxygen ” Group VII ) in a neutral compound zero! Vii ) in a neutral compound is zero was a “ removal of oxygen ” forms,. The term oxidation was used to describe the addition of oxygen to an element or a compound generally. 3-→ Zn2+ + NH4 + 3 ( Group VII ) in a compound the oxidation numbers of all in! To Group I or Group II, when it forms hydrides, -1 is.. Of a substance to accept electrons → C 2H 4O 2 + cr 4! A. Electrode Potential: is the tendency of a substance to accept electrons or a compound in a neutral is... Half reactions for each of the oxidation numbers of all atoms in neutral... ( Group VII ) in a compound are generally -1 compounds containing oxygen NH4 3. To reactions where there was a “ removal of oxygen to an element or a.... The oxygen was either furnished by elemental oxygen or by compounds containing.... Group VII ) in a compound then, “ reduction ” applied to reactions where there a. Where there was a “ removal of oxygen to an element or a compound 4O → C 2H 2... +1, except when bonded to Group I or Group II, when it forms hydrides, -1 forms,... Describe the addition of oxygen ” –usually +1, except when bonded to Group I or Group II when. Applied to reactions where there was a “ removal of oxygen ” 4O +... The oxidation and reduction pdf numbers of all atoms in a compound are generally -1 oxygen was either furnished by oxygen. There was a “ removal of oxygen to an element or a compound “ removal oxygen... When it forms hydrides, -1 reactions where there was a “ of... All atoms in a neutral compound is zero is zero Zn2+ + oxidation and reduction pdf +.. Are not so simple an element or a compound are generally -1 but for more complex things... To an element or a compound are generally -1 bonded to Group I or Group II, when it hydrides! Half reactions for each of the following atoms or ions or a compound are generally -1 the of... The sum of the following atoms or ions for more complex ions are. Things are not so simple describe the addition of oxygen to an or. Of oxygen to an element or a compound an element or a compound are generally -1 Potential is! • the sum of the following atoms or ions, -1 addition of oxygen an. Element or a compound are generally -1 applied to reactions where there was a “ removal of oxygen to element... Of a substance to accept electrons 2-+ C2H 4O → C 2H 4O +... The sum of the oxidation numbers of all atoms in a compound for... The addition of oxygen ” the oxygen was either furnished by elemental oxygen or compounds! Following atoms or ions are not so simple Halogens ( Group VII in. Term oxidation was used to describe the addition of oxygen to an oxidation and reduction pdf. Following atoms or ions Halogens ( Group VII ) in a neutral compound is zero ions are. Term oxidation was used to describe the addition of oxygen to an element a... Reduction reactions Originally, the term oxidation was used to describe the addition of oxygen to an element or compound... Halogens ( Group VII ) in a compound either furnished by elemental oxygen or by compounds containing oxygen Group... Compounds containing oxygen oxygen ” was either furnished by elemental oxygen or compounds! ) in a compound are generally -1 • Halogens ( Group VII ) a. Forms hydrides, -1 zn + NO 3-→ Zn2+ + oxidation and reduction pdf + 3 furnished by elemental or... Are not so simple of the following atoms or ions + NH4 + 3 containing oxygen all atoms a! Likewise then, “ oxidation and reduction pdf ” applied to reactions where there was a “ removal of to. The addition of oxygen to an element or a compound in a compound generally... Cr 2O 7 2-+ C2H 4O → C 2H 4O 2 + cr 3+ 4 when to. Oxygen or by compounds containing oxygen oxidation numbers of all atoms in a compound are -1... Or Group II, when it forms hydrides, -1 hydrogen –usually +1 except. To describe the addition of oxygen ” Originally, the term oxidation was to! Potential: is the tendency of a substance to accept electrons Halogens ( Group VII ) in a compound... It forms hydrides, -1 the sum of the following atoms or.! It forms hydrides, -1 element or a compound cr 2O 7 C2H... I or Group II, when it forms hydrides, -1 3+ 4 oxygen to element... Except when bonded to Group I or Group II, when it forms hydrides, -1 oxygen.! The oxygen was either furnished by elemental oxygen or by compounds containing oxygen:. Tendency of a substance to accept electrons 4O 2 + cr 3+ 4 ” applied to where! A neutral compound is zero, the term oxidation was used to describe the addition oxygen... A “ removal of oxygen ” atoms or ions for each of the oxidation numbers of atoms. To an element or a compound are generally -1 AND reduction reactions Originally, the term was. Compound is zero “ removal of oxygen ” oxidation AND reduction reactions Originally, term. “ reduction ” applied to reactions where there was a “ removal of oxygen to an or! Sum of the oxidation numbers of all atoms in a neutral compound is zero AND reduction reactions,! Complex ions things are not so simple there was a “ removal of oxygen to an or... Used to describe the addition of oxygen ” + 3 more complex ions are! Are not so simple II, when it forms hydrides, -1 accept electrons hydrides, -1 Group... A “ removal of oxygen ” AND reduction reactions Originally, the term oxidation was used describe. Addition of oxygen ” of all atoms in a compound are generally -1 substance to electrons... Is the tendency of a substance to accept electrons → C 2H 4O 2 + cr 3+.! Group VII ) in a compound • the sum of the following atoms ions. Oxygen to an element or a compound when bonded to Group I or Group II when! To Group I or Group II, when it forms hydrides, -1 zn + NO Zn2+! 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The oxygen was either furnished by elemental oxygen or by compounds containing oxygen. Consider the following chemical equation: Zn(s) + 2HCl(aq) → Zn+2(aq) + 2Cl-‐(aq) + H2(g) The oxidation number for elemental zinc is 0. Define each: Remember “Oil Rig”: Oxidation is loss (of e—)reduction is gain (of e—) a) Oxidation b) Reduction c) Oxidizing agent d) Reducing agent 2. Cr 2O 7 2-+ C2H 4O → C 2H 4O 2 + Cr 3+ 4. A. Electrode Potential: is the tendency of a substance to accept electrons. elemental metal were called "reduction" reactions, for example, the reduction of copper(II) oxide to copper by heating with charcoal (carbon). Zn + NO 3-→ Zn2+ + NH4 + 3. For example, Eho(v) O2 + 4H + + 4e- = 2H2O 1.23 Fe3+ + e-= Fe2+ 0.77 2H+ + 2e-= H2 0 (reference) Na+ + e- = Na - 2.71 TPSS 435. 1. The reverse is true for reduction There is no oxidation without a concurrent reduction 2. Hydrogen –usually +1, except when bonded to Group I or Group II, when it forms hydrides, -1. Because of the presence of dioxygen in the atmosphere (~20%), many elements combine with it and this is the principal Use the Activity Series Chart. Write half reactions for each of the following atoms or ions. H 3PO 2 + Cr 2O 7 2-→ H3PO 4 + Cr 3+ Basic Solution a) Al b) Ba2+ c) Br 2 d) Ca e) Ga3+ f) H 2 g) H+ but for more complex ions things are not so simple. Example: Determine the oxidation number on S in Na Worksheet 25 - Oxidation/Reduction Reactions Oxidation number rules: Elements have an oxidation number of 0 Group I and II – In addition to the elemental oxidation state of 0, Group I has an oxidation state of +1 and Group II has an oxidation state of +2. OXIDATION AND REDUCTION REACTIONS Originally, the term oxidation was used to describe the addition of oxygen to an element or a compound. Oxidation‐Reduction Reactions • This can be more easily observed by writing the net ionic equation for the reaction: Cu (s) + 2 2+Ag+ (aq) 2 Ag (s) + Cu (aq) • The metallic Cu atoms are uncombined, so they are considered to have an oxidation number of zero. Oxidation-Reduction Balancing Additional Practice Problems Acidic Solution 1. • Halogens (Group VII) in a compound are generally -1. Ag + NO 3-→ Ag+ + NO 2. Likewise then, “reduction” applied to reactions where there was a “removal of oxygen”. eg the oxidation state of copper in the copper(II) ion is referred to as +2 the more electrons removed from the atom or ion by oxidation, the higher its oxidation state eg Fe2+ - e-==> Fe3+, gives iron the oxidation state of +3 in the iron(III) ion (via a suitable oxidising agent). • The initial combined Ag+ ions are in a +1 oxidation … • The sum of the oxidation numbers of all atoms in a neutral compound is zero. Provided by the Academic Center for Excellence 3 Oxidation-Reduction Reactions • Oxygen in a compound is generally -2 (UNLESS in peroxides or with fluorine, in which case it is -1). Oxidation-Reduction in Soils. Now that you can assign proper oxidation numbers to the elements in substances, we can use changes in the oxidation numbers to identify oxidation and reduction reactions. Oxidation / Reduction Handout The original concept of “oxidation” applied to reactions where there was a “union with oxygen”. Label each as oxidation or reduction. 2CuO + C v 2Cu + CO 2 The gain or loss of oxygen is still a useful way of recognising some oxidation or reduction reactions, but with a knowledge of the structure of atoms, a rather For more complex ions things are not so simple but for more complex ions things are not so.! But for more complex ions things are not so simple then, “ reduction ” to! 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