What type of energy is used to drive a non-spontaneous chemical reaction in electrolysis?
Electrical energy
In electrolysis, an electric current is passed through an electrolyte
The electrolyte in electrolysis must be a solution or molten compound that conducts electricity.
Match the components of the electrolysis of water with their corresponding products:
Cathode ↔️ Hydrogen gas
Anode ↔️ Oxygen gas
Arrange the components of an electrolytic cell in their order of function:
1️⃣ Electric power supply
2️⃣ Electrolyte
3️⃣ Anode
4️⃣ Cathode
What is the charge of the anode in an electrolytic cell?
Positive
The anode in an electrolytic cell is where oxidation occurs.
Reduction occurs at the cathode in an electrolytic cell.
Match the electrode with its process and electron activity:
Anode ↔️ Oxidation, loses electrons
Cathode ↔️ Reduction, gains electrons
What are the products of electrolyzing molten sodium chloride (NaCl)?
Sodium metal and chlorine gas
In electrolysis, oxidation involves the loss of electrons.
What is the charge of the electrode where oxidation occurs?
Positive
The reaction A→A++e− represents oxidation at the anode.
Match the process with its definition and electron activity:
Oxidation ↔️ Loss of electrons
Reduction ↔️ Gain of electrons
What determines the products of electrolysis in aqueous solutions?
Discharge preference of ions
Cations with lower reduction potential are more likely to be reduced.
In electrolysis, Br− ions are oxidized before OH− ions because they have a higher oxidation potential.
What gas is produced at the cathode when electrolyzing concentrated NaCl solution?
Hydrogen gas
The reaction at the anode in the electrolysis of concentrated NaCl solution is 2Cl^{ - } \rightarrow Cl_{2} + 2e^{ - }</latex>, which produces chlorine gas.
Match the electrode with its charge and process:
Anode ↔️ Positive, oxidation
Cathode ↔️ Negative, reduction
What is the role of the anode in an electrolytic cell?
Oxidation
The cathode in an electrolytic cell is the negative
An electrolyte in an electrolytic cell must contain ions to conduct electricity
What provides the energy to drive electrolysis in an electrolytic cell?
Electric power supply
Match the electrode with its properties:
Anode ↔️ Positive charge, oxidation
Cathode ↔️ Negative charge, reduction
In the electrolysis of molten NaCl, which ion is reduced at the cathode?
Na+
Oxidation involves the loss of electrons
Reduction always occurs at the cathode in electrolysis
In the electrolysis of NaCl, what gas is formed at the anode?
Cl_{2}</latex>
Cations with lower reduction potential are more likely to be discharged at the cathode
Anions with higher oxidation potential are more likely to be discharged at the anode
What gas is produced at the cathode during the electrolysis of concentrated NaCl solution?
H2
An active electrode participates in the chemical reaction by being oxidized or reduced
What is an example of an inert electrode in electrolysis?
Platinum
Steps to calculate cell potential
1️⃣ Identify the oxidation and reduction half-reactions
2️⃣ Find the standard electrode potentials for each half-reaction
3️⃣ Use the formula Ecell°=Ereduction°−Eoxidation°
What is the cell potential for a cell with Cu2+/Cu andZn^{2 + }/Zn</latex> half-cells?
+1.10V
Electrolysis uses electrical energy to drive a non-spontaneous
Write the balanced equation for the electrolysis of water.