Electrolysis 1

What is the product formed at the cathode during the electrolysis of molten magnesium fluoride?

• magnesium
• hydrogen
• fluorine
• oxygen

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

• water
• oxygen
• hydrogen
• chlorine

What is electrolysis?

• breaking down of a compound using a current
• making a compound using a current

Tags

NGSS.HS-PS3-5

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

What is the name given to the solution that is being electrolysed?

• Salt solution
• Electric solution
• Mineral solution
• Electrolyte

Tags

NGSS.HS-PS1-5

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

What is the equation to show what happens to Cl ions at the anode.

• Cl^- --> Cl + e-   
• 2Cl^- --> Cl₂ + 2e-   
• Cl₂ + 2e-   2Cl^- 
• Cl₂ + 2e-  _-->  2Cl^- 

Tags

NGSS.HS-PS2-5

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

Tags

NGSS.HS-PS1-3

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

Which of the following substances conducts electricity in both the solid and liquid states?

• Paraffin wax
• Potassium
• Potassium chloride
• Sulfur
• Venus

Tags

NGSS.HS-PS2-5