4.1.3 Oxidation and reduction in terms of electrons

Cards (80)

What is the definition of oxidation in terms of electron transfer?
Loss of electrons
What is an analogy for oxidation in terms of electron transfer?
Electron donation
Reduction is the gain of electrons by an atom, ion, or molecule during a chemical reaction. When a substance gains electrons, its oxidation state decreases
Match the concept with its definition or characteristic:
Oxidation ↔️ Loss of electrons
Reduction ↔️ Gain of electrons
Oxidation state ↔️ Increases during oxidation
Electron donation ↔️ Analogy for oxidation
What happens to the oxidation state of a substance when it is reduced?
It decreases
Which substance acts as an oxidizing agent in the reaction $2Na +$ $Cl_{2} \rightarrow 2NaCl$ ? 
Chlorine
An oxidizing agent gains electrons and reduces its oxidation state. 
True
A reducing agent acts as an electron donor
Steps of balancing redox equations using the half-equation method
1️⃣ Write half-equations
2️⃣ Balance atoms
3️⃣ Add water to balance oxygen
4️⃣ Add hydrogen ions to balance hydrogen
5️⃣ Add electrons to balance charge
6️⃣ Multiply half-equations to equalize electron transfer
7️⃣ Combine half-equations
Oxidation results in an increase in the oxidation state of a substance.
What is oxidation in terms of electron transfer?
Loss of electrons
What is an analogy for oxidation in terms of electron transfer?
Electron donation
What is reduction in terms of electron transfer?
Gain of electrons
What is an analogy for reduction in terms of electron transfer?
Electron acceptance
In the reaction $2Na +$ $Cl_{2} \rightarrow 2NaCl$ , chlorine (Cl₂) acts as the oxidizing agent
In the reaction $2Na +$ $Cl_{2} \rightarrow 2NaCl$ , sodium (Na) acts as the reducing agent
Half-equations must be multiplied to equalize the number of electrons transferred. 
True
Simplifying a redox equation involves combining like terms and adding any remaining substances. 
True
Oxidation is the loss of electrons by an atom, ion, or molecule during a chemical reaction. When a substance loses electrons, its oxidation state increases
In the reaction 2Na + Cl_{2} \rightarrow 2NaCl</latex>, chlorine (Cl) is reduced because it gains an electron. 
True
What happens to the oxidation state of a substance when it is oxidized?
It increases
In the reaction $2Na +$ $Cl_{2} \rightarrow 2NaCl$ , chlorine (Cl) is reduced because it gains an electron. 
True
What is an oxidizing agent in a redox reaction?
Electron acceptor
In the reaction $2Na +$ $Cl_{2} \rightarrow 2NaCl$ , which substance acts as the oxidizing agent? 
Chlorine
A reducing agent loses electrons and increases its oxidation state. 
True
Balancing redox equations requires the half-equation method because it ensures electron transfer is balanced. 
True
Match the concept with its description:
Oxidation ↔️ Loss of electrons
Reduction ↔️ Gain of electrons
When a substance loses electrons, its oxidation state increases. 
True
During oxidation, the oxidation state increases
When a substance gains electrons, its oxidation state decreases. 
True
Reduction involves a decrease in oxidation state. 
True
An oxidizing agent is reduced during a redox reaction. 
True
A reducing agent loses electrons and increases its oxidation state during a redox reaction.
True
What is the balanced redox equation for the reaction $2KMnO_{4} +$ $16HCl$ ? 
2KMnO_{4} + 16HCl \rightarrow 2KCl + 2MnCl_{2} + 8H_{2}O + 5Cl_{2}</latex>
In the reaction $2Na +$ $Cl_{2} \rightarrow 2NaCl$ , sodium (Na) is oxidized because it loses an electron. 
True
What is the definition of reduction in terms of electron transfer?
Gain of electrons
What is an analogy for reduction in terms of electron transfer?
Electron acceptance
In the reaction 2Na + Cl_{2} \rightarrow 2NaCl</latex>, sodium (Na) is oxidized because it loses an electron. 
True
An oxidizing agent is a substance that accepts electrons from another substance during a redox reaction, causing the other substance to be oxidized
An oxidizing agent acts as an electron acceptor