Chemical Changes - Electrolysis

Question 1

What is electric current?

Answer 1

The flow of electrons or ions

Question 2

What electrode does something with a positive charge move to?

Answer 2

The cathode

Question 3

What are electrodes made of?

Answer 3

Graphite

Question 4

What electrode do thing with a negative charge move to?

Answer 4

The anode

Question 5

What is electrolysis used for?

Answer 5

Extracting metals

Question 6

What is a negative of electrolysis?

Answer 6

It requires a lot of enegy

Question 7

Describe experiments to identify electrolytes

Answer 7

Place 2 Electrodes in the solution of your choice
Connect to wires using crocodile clips and power source
Add bulb to circuit
Turn on circuit and without letting electrodes touch test if circuit is complete by seeing if bulb is on

Question 8

In a molten compound what is discharged

Answer 8

The least reactive element

Question 9

In an aqueous solution what is displaced

Answer 9

The least reactive element or hydrogen ions (H+) and hydroxide ions (OH-)

Question 10

How to do a half equation

Cathode

Answer 10

Cathode:

Na+ + e- → Na

Question 11

How to do half equation

Anode

Answer 11

Anode:

2Cl- → Cl2 + 2e-