Chemistry electrolysis And Other Hard Topics Flashcards
What is electrolysis?
Breaking down a compound using electricity
What is needed for electrolysis to work?
The ions must be free to move
Where do the negative ions go and where does the positive ions go? Which electrolyte?
The negative ions will move to the positive electrolyte and the positive ions will move to the negative ions
What is oxidation?
- Loss of electrons
- Happens at the positive electrode
- Happens on the negative ions
What is reduction?
- gain of electrons
- happens to the positive ions
- happens on the negative electrode
What is electroplating?
Applying a thin layer of metal by electrolysis
Why is cryolite used to manufacture aluminum?
To lower aluminum’s melting point
What is another name for aluminum ore?
Bauxite
Why is a membrane used in electrolysis?
To separate the negative and positive ions so it doesn’t react with each other
What are the uses of hydrogen, chlorine and sodium hydroxide?
Hydrogen is used as rocket fuel
Sodium hydroxide is used to make soap
Chlorine is used to kill bacteria in water
