Electrolysis

What is the name of the positive electrode?

• cathode
• anode

What is the name of the negative electrode?

• cathode
• anode

The negatively charged ions are attracted to the ________.

• anode

• cathode

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The diagram shows the electrolysis of lead(II) bromide using inert electrodes. Why does the bulb only light up when the lead(II) bromide is melted?

• Bromine atoms in lead(II) bromide are converted to ions when it is melted

• Electrons flow through the lead(II) bromide when it is melted

• The ions in lead(II) bromide are mobile charge carriers in the molten state.

• There are no ions in solid lead(II) bromide

In electrolytic cell that uses aqueous copper(II) sulfate as electrolyte and copper plates as electrodes, what is the product at the anode?

• Oxygen gas and water

• Copper metal

• Copper(II) ions

• Hydrogen gas

Anions get discharged by ________ electrons at the ___________

• gaining, cathode

• losing, anode

• gaining, anode

• losing, cathode

Tags

NGSS.HS-PS2-5

What is the gas produced at the anode during the electrolysis of very dilute hydrochloric acid?

• water

• oxygen

• hydrogen

• chlorine

What is the product formed at the anode during the electrolysis of concentrated copper(II) chloride?

• copper
• chlorine
• hydrogen
• oxygen

Positive ions (cations) move towards the cathode (-) where they will discharge by....

• Breaking apart

• Losing electrons

• Clumping together.

• Gaining electrons

Tags

NGSS.HS-PS2-5

Choose the half-equation that shows the discharge of aluminium ion.

• Al³⁺ - 3e^- --> Al

• Al²⁺ + 3e^- --> Al

• Al³⁺ + 3e^- --> Al

• Al³⁺ --> Al + 3e^-