Topic 3

Question 1

3.22 Recall that electrolytes are ionic compounds in the molten state

Answer 1

When an ionic substance is melted or dissolved, the ions are free to move about within the solution - electrolyte

Question 2

3.23 Describe electrolysis as a process

Answer 2

Electrolysis = process in which electrical energy, from a direct current supply decomposes electrolytes
Passing a current through substances that are molten or solution means that the solution can be broken down into elements.

Question 3

3.24 movment of ions during electrolysis

Answer 3

During electrolysis, positively charged ions (cations) move to the negative electrode (cathode), and negatively charged ions (anions) move to the positve electrode (anode). Ions are discharged at the electrodes producing elements.

Question 4

3.25 Formation of products in electrolysis

Answer 4

When you have a ionic solution, your solution will contain : the ions that make up the ionic compound, and the ions in the water.
Cathode : hyrogen from H+ water is produced
Anode : Oxygen from OH- in water.