Electrolyte that doesn't react with ZnO for electrolysis of water

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SUMMARY

The discussion focuses on identifying electrolytes that do not react with zinc oxide (ZnO) during the electrolysis of water. Sodium hydroxide (NaOH) and potassium hydroxide (KOH) are effective electrolytes but react with ZnO. Participants suggest sodium sulfate as a potential alternative, emphasizing the need for a neutral electrolyte with a stable anion that does not oxidize, ruling out chlorides. Other recommended options include sulfates of sodium, lithium, and potassium, as well as perchlorates, although the latter may be more costly.

PREREQUISITES
  • Understanding of electrolysis principles
  • Knowledge of amphoteric substances, specifically ZnO
  • Familiarity with common electrolytes like NaOH and KOH
  • Basic chemistry of salts and their reactions in solutions
NEXT STEPS
  • Research the properties of sodium sulfate as an electrolyte
  • Investigate the stability of lithium and potassium sulfates in electrolysis
  • Explore the use of perchlorates in electrolysis applications
  • Study the effects of amphoteric substances on electrolysis reactions
USEFUL FOR

Chemists, electrochemists, and researchers involved in water electrolysis and those seeking stable electrolyte solutions for experiments involving ZnO.

kevin_tee
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Does anybody know electrolyte that doesn't react with ZnO for electrolysis of water? NaOH and KOH is good electrolyte for electrolysis of water, but it react with ZnO. Thanks.:smile:
 
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Sodium sulfate?
 
Thanks, I will try using sodium sulfate but are there any more possible electrolytes?
 
You need something that is neutral, as ZnO is amphoteric. Most salts of strong acids and strong bases will be neutral in solutions (or close to neutral) - but you need a stable anion, that would not get oxidized, which means of the obvious ones chlorides are out of the question. Sulfates of sodium, lithium, potassium sound best to me, perhaps perchlorates would be good as well - but definitely more expensive..
 
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