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Questions and Answers
What occurs during a redox reaction?
What occurs during a redox reaction?
- The total mass of the reactants is reduced.
- Electrons are created and destroyed.
- Chemical bonds are broken without any change in charge.
- Electrons are transferred between chemical species. (correct)
What does a reduction reaction involve?
What does a reduction reaction involve?
- Losing electrons.
- Combining with oxygen.
- Gaining protons.
- Gaining electrons. (correct)
In the formation of calcium oxide, which species is oxidized?
In the formation of calcium oxide, which species is oxidized?
- Calcium oxide compound.
- Electrons.
- Oxygen atoms.
- Calcium metal. (correct)
Which best describes oxidation in a chemical reaction?
Which best describes oxidation in a chemical reaction?
Why is the term 'oxidation' not limited to reactions involving oxygen?
Why is the term 'oxidation' not limited to reactions involving oxygen?
What is the charge of a calcium ion after being oxidized?
What is the charge of a calcium ion after being oxidized?
In the reaction of magnesium oxide with hydrogen, which shift indicates reduction?
In the reaction of magnesium oxide with hydrogen, which shift indicates reduction?
What was Antoine Lavoisier's contribution to the concept of oxidation?
What was Antoine Lavoisier's contribution to the concept of oxidation?
What happens to the charge of magnesium when it goes from magnesium oxide to solid magnesium?
What happens to the charge of magnesium when it goes from magnesium oxide to solid magnesium?
Which ion is being reduced in the reaction between zinc chloride and magnesium?
Which ion is being reduced in the reaction between zinc chloride and magnesium?
What is the main characteristic of spectator ions in a chemical reaction?
What is the main characteristic of spectator ions in a chemical reaction?
What mnemonic device can help remember the concepts of oxidation and reduction?
What mnemonic device can help remember the concepts of oxidation and reduction?
During the reaction of magnesium with zinc chloride, how does magnesium behave?
During the reaction of magnesium with zinc chloride, how does magnesium behave?
In the reaction between magnesium oxide and hydrogen, which of the following is true regarding magnesium?
In the reaction between magnesium oxide and hydrogen, which of the following is true regarding magnesium?
What is the final charge of solid zinc after the reaction with magnesium?
What is the final charge of solid zinc after the reaction with magnesium?
In the context of oxidation and reduction, what does the term 'oxidation' specifically refer to?
In the context of oxidation and reduction, what does the term 'oxidation' specifically refer to?
Flashcards
Redox Reaction
Redox Reaction
A chemical reaction involving the transfer of electrons between species.
Reduction
Reduction
A chemical reaction where a species gains electrons, associated with a decrease in oxidation state.
Oxidation
Oxidation
A chemical reaction where a species loses electrons, associated with an increase in oxidation state.
Oxidation (Oxygen)
Oxidation (Oxygen)
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Oxidation State
Oxidation State
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Example of Oxidation
Example of Oxidation
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Redox and Oxygen
Redox and Oxygen
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Magnesium Oxide Reduction
Magnesium Oxide Reduction
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Magnesium Oxidation
Magnesium Oxidation
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Magnesium Reduction
Magnesium Reduction
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Oxidation
Oxidation
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Reduction
Reduction
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Spectator Ions
Spectator Ions
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Ionic Compound
Ionic Compound
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Chemical Equation
Chemical Equation
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Net Ionic Equation
Net Ionic Equation
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Study Notes
Redox Reactions
- Redox reactions involve electron transfer between species.
- Oxidation is the loss of electrons; reduction is the gain of electrons.
- "OIL RIG" is a helpful mnemonic: Oxidation Involves Loss, Reduction Involves Gain.
- Oxidation doesn't always involve oxygen. The original meaning of oxidation came from reactions involving oxygen.
- The transfer of electrons results in a change in charge of the species involved.
Example: Calcium Oxide Formation
- 2Ca(s) + O₂(g) → 2CaO(s)
- Calcium loses electrons, forming Ca²⁺ ions (oxidation).
- Oxygen gains electrons, forming O²⁻ ions (reduction).
- Oxygen is frequently reduced in redox reactions involving oxygen, but not always.
Example: Determining Oxidation/Reduction
- MgO + H₂ → Mg + H₂O
- Mg²⁺ in MgO is reduced to Mg⁰ (gaining electrons).
- Magnesium oxide is reduced.
Example: Zinc Chloride and Magnesium
- ZnCl₂(aq) + Mg(s) → MgCl₂(aq) + Zn(s)
- Magnesium is oxidized (loses electrons) to Mg²⁺(aq).
- Zinc is reduced (gains electrons) forming Zn⁰(s)
- Chloride ions are spectator ions (no charge change).
Net Ionic Equation
- The spectator ions are omitted to obtain the net ionic equation
- Zn²⁺(aq) + Mg(s) → Mg²⁺(aq) + Zn(s)
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