Electrolysis of Brine

• Brine is concentrated aqueous NaCl solution
• Ions present: Na+, H+, Cl- and OH$^-$

  
• At the anode: Made of titanium, CL- ions (ch

  At the cathode: Made of steel, Hydrogen cations reduced to molecules

  
• Unreacted ions (Na+, H+and OH-) move through porous membrane due to difference in liquid pressure

  
• Left Na+and OH-which form aqueous sodium hydroxide