Electrolysis and Ion Discharge Concepts

The video explains electrolysis, a process to split compounds into elements using electric current. It covers the setup required for electrolysis experiments, including a beaker, electrodes, and a power supply. The video discusses ion movement in aqueous solutions and the rules for ion discharge at the cathode and anode. Examples of electrolysis with copper sulfate and sodium chloride are provided, illustrating how different ions are discharged based on reactivity and presence of halides.

What is the primary requirement for ions in an electrolyte to enable electrolysis?

• They must be solid.

• They must be bound to a metal.

• They must be free to move.

• They must be in a gaseous state.

In an electrolysis experiment, what is the role of the power supply?

• To provide heat to the solution.

• To supply electric current to the electrodes.

• To mix the solution.

• To cool down the electrolyte.

Which ions are attracted to the cathode during electrolysis?

• Neutral molecules

• Positive ions

• Gaseous ions

• Negative ions

According to the reactivity series, which ion is discharged at the cathode?

• The lightest ion

• The heaviest ion

• The least reactive ion

• The most reactive ion

What determines which ion is discharged at the anode?

• The presence of halides

• The pH level of the solution

• The temperature of the solution

• The color of the solution

If no halides are present, which ion is typically discharged at the anode?

• Hydroxide ion

• Nitrate ion

• Sulfate ion

• Carbonate ion

In the electrolysis of copper sulfate, which ion is discharged at the cathode?

• Hydroxide ion

• Hydrogen ion

• Copper ion

• Sulfate ion

What is formed at the anode during the electrolysis of copper sulfate?

• Copper metal

• Oxygen and water

• Hydrogen gas

• Chlorine gas

During the electrolysis of sodium chloride, which gas is formed at the cathode?

• Nitrogen

• Oxygen

• Hydrogen

• Chlorine

Which ion is discharged at the anode in the electrolysis of sodium chloride?

• Hydroxide ion

• Chloride ion

• Sodium ion

• Sulfate ion