Electrolysis

What is electrolysis?

• breaking down of a compound using a current

• making a compound using a current

Tags

NGSS.HS-PS2-5

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

Explain why the electrolyte has to be a liquid/solution

• So the ions can move

• So the electrons can move

• So that it doesn't get too hot

What happens at the positive electrode?

• Negative ions will discharge there

• Positive ions will discharge there

Tags

NGSS.HS-PS2-5

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

• Breaking apart

• Clumping together

• Gaining electrons

• Losing electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

When molten NaCl compound is electrolysed what has forms at the anode?

• Hydrogen

• Chlorine

• Oxygen

• Sodium

What does the Cathode (-) do to ions?

• Give electrons to the positive ions to turn them back into atoms

• Take electrons from the positive ions

• Turn ions back into atoms by removing electrons

• Turn atoms into ions by adding electrons

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-

What is the name of the positive electrode?

• cathode

• anode