Chapter 10 (Electrolysis) Flashcards
What is needed in order for things to conduct electricity?
Charged particles (electrons / ions) which are free to move must be present.
Why do metals conduct electricity?
They have free moving delocalized electrons.
Do ionic compounds conduct electricity?
- Not in solid form
- Conduct when they are molten or dissolved in water
Do covalent compounds conduct electricity?
No
What are some exceptions of covalent compounds that can conduct electricity?
Covalent compounds that form ions as they react with water.
What is electrolysis?
Electrolysis is a chemical change caused by passing an electric current through a compound which is either molten or in solution.
What is electrolyte?
Electrolyte is a liquid or solution that undergoes electrolysis.
What does electrolyte contain?
Ions
How is the electricity passed into and out of the electrolyte?
Through 2 electrodes
What are usually used for electrodes?
Carbon and platinum
What does positive and negative electrode called?
Positive electrode - Anode
Negative electrode - Cathode
What does half-equations show?
It shows either oxidation or reduction reactions.
What is discharging an ion?
It means it lost its charge.
How can ions discharge?
- Giving up electrons
- Receiving electrons
What is oxidation and reduction?
- Oxidation occurs when something loses electrons
- Reduction occurs when something gains electrons
