electrolysis of aqueous solutions

• what other ions will there be in the water as well as the ions from the ionic compounds in an aqueous solution 


  hydrogen(H+)

  hydroxide(OH-)
• which electrode attracts H+ ions

  negative electrode
• which electrode attracts OH- ions


  positive electrode
• what is the rule for discharging at the negative electrode in an aqueous solution

  the least reactive element will be discharged(has to be less reactive that H+ ion)
• what is the rule for discharging at the positive electrode in an aqueous solution


  if there is a halide/halogen present then that will be the element being displaced but if not then OH- ion will be being displaced
• what is the equation for when OH- is being discharged in an aqueous solution 


  4OH- ➡️ 2H2O + O2 + 4e-
• what is the first thing to write in a question about aqueous electrolysis 


  there is H+ and OH- ions present/broken down from the water
• at the cathode, when will hydrogen gas be produced

  if the metal ions form an elemental metal that is more reactive than hydrogen
• at the cathode, when will a solid layer of pure metal be formed

  if the metal ions form an elemental metal thag is less reactive that hydrogen
• what goes between the anode and the cathode outside of the water in the electrolysis diagram

  dc power supply