Electrolysis

Which statement correctly describes the 2 electrodes?

• The anode is negative and the cathode is positive
• The anode and cathode are both positive
• The anode is positive and the cathode is negative
• The anode and cathode are both negative.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

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

• Breaking apart
• Losing electrons
• Clumping together.
• Gaining electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which equation shows what happen to chloride ions at the anode.

• Cl^- --> Cl + e-

• 2Cl^- --> Cl₂ + 2e-

• Cl₂ - -> 2e- + 2Cl^-

• Cl₂ + 2e- _--> 2Cl^-

Tags

NGSS.HS-PS3-5

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

• Al³⁺ - 3e^- --> Al

• Al²⁺ + 3e^- --> Al

• Al³⁺ + 3e^- --> Al

• Al³⁺ --> Al + 3e^-

Tags

NGSS.HS-PS1-2

Ionic compounds do not conduct electricity when they are solid because,

• their electrons are not free to move

• their ions are free to move

• their ions are not free to move

• their electrons are free to move

Tags

NGSS.HS-PS1-3

In an aqueous solution of copper chloride, which ions are attracted to the negative electrode?

• Cu²⁺ and Cl^- and H⁺ and OH^-
• Cu²⁺ and H⁺ 
•  Cl^- and OH^-
• Cu²⁺ 

Tags

NGSS.HS-PS2-5

What are the ions present in molten Al₂O₃?

• Al²⁺ and O^3-

• Al^2- and O³⁺

• Al³⁺ and O^2-

• Al^3- and O²⁺

Oxidation is loss of electron. Where does oxidation take place during electrolysis.

• At anode

• In the electrolyte

• At the circuit

• At cathode

What is the name of the positive electrode?

• cathode
• anode

What is the name of the negative electrode?

• cathode
• anode