CC10 Electrolysis Flashcards
(14 cards)
Magnesium carbonate is insoluble. What do you need to do before it will conduct electricity?
Melt it
Sodium fluoride is soluble. Explain what the easiest way for it to conduct electricity is
Dissolve it in water because this does not require high temperatures
Which ions are in NaCl
Na⁺ and Cl⁻
Which ions are in CuCl₂
Cu²⁺ and two Cl⁻
Which ions are in Na₂SO₄
2 ions of Na⁺ and one SO₄²⁻
What is electrolysis?
Using a dc electric current to decompose (break down) a substance
What is an electrolyte?
An ionic compound in the molten state or dissolved in water
What happens to an ionic substance when it is melted or dissolved in water?
The ions become free to move around
What is the name for the positive electrode?
The anode
What is the name for the negative electrode?
The cathode
Do positive ions move to the anode or the cathode?
Cathode
Do negative ions move to the anode or the cathode?
Anode
What will be the products of the electrolysis of molten iron bromide?
Iron and bromine
What will be the products of the electrolysis of molten zinc oxide?
Zinc and oxygen
