Electrolysis of Brine

What is Brine?

• Water with a high concentration of Sodium Chloride

• Water with a high concentration of Lead Bromide

• Vinegary water

• Pure water

Na is a metal, and Chlorine is non-metal halogen. Which of these will be broken down into positive ions, and which will be negative ions?

• Na+ and Cl-

• Na- and Cl+

• Na+ and Cl+

• Na- and Cl-

Water is composed of H₂O (2 Hydrogen and 1 Oxygen). Which of these will be broken down into positive ions, and which will be negative ions?

• H+ and OH-

• H- and OH+

• HH+ and O-

• OO+ and H-

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

• Na+ and H+

• Cl- and OH-

• Na+ and Cl-

• H+ and OH-

Which ions are attracted to the positive electrode (anode)?

• Na+ and H+

• Cl- and OH-

• Na+ and Cl-

• H+ and OH-

Hydrogen gas will form at which electrode?

• Negative electrode (cathode)

• Positive electrode (anode)

• Both

• Neither

Chlorine gas will form at which electrode?

• Negative electrode (cathode)

• Positive electrode (anode)

• Both

• Neither

We use the acronym OILRIG to remember what oxidation and reduction are. What does OILRIG mean?

• Oxidation Is Loss (of electrons), Reduction Is Gain (of electrons)

• Oxygen Is Literally Really Incredibly Great

• Oxygen Is Little, Radon Is Giant

The Chlorine ions, Cl-, have an extra electron each, and drop those electrons off (lose them) at the anode. What type of reaction is this?

(use OILRIG)

• Oxidation

• Reduction

• Acidic

The Hydrogen ions, H+, are missing an electron each, and need to pick up (gain) electrons at the Cathode. What type of reaction is this?

(use OILRIG)

• Oxidation

• Reduction

• Catalytic