Brine Electrolysis

Multiple Choice

What is electrolysis?

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

Multiple Choice

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.

Multiple Choice

Explain why the electrolyte has to be a liquid.

• So the ions can move
• So the electrons can move
• So that it doesn't get too hot
• So the fish are ok

Multiple Choice

When NaCl solution is electrolysed what has forms at the anode?

• Hydrogen
• Oxygen
• Chlorine
• Sodium

Multiple Choice

What is Brine?

• Water with a high concentration of Sodium Chloride

• Water with a high concentration of Lead Bromide

• Vinegary water

• Pure water

Multiple Choice

Which ions are attracted to the negative electrode (cathode)?

• Na+ and H+

• Cl- and OH-

• Na+ and Cl-

• H+ and OH-

Multiple Choice

Hydrogen gas will form at which electrode?

• Negative electrode (cathode)

• Positive electrode (anode)

• Both

• Neither

Multiple Choice

Chlorine gas will form at which electrode?

• Negative electrode (cathode)

• Positive electrode (anode)

• Both

• Neither

Multiple Choice

How do you test for Hydrogen gas?

• A squeaky pop when lit

• Smell it

• Check the colour

• Ask an expert