Electrolysis (National 5)

What is electrolysis?

• breaking down of a compound using a current
• making a compound using a current

Tags

NGSS.HS-PS3-5

What kind of electrical current is used in electrolysis?

• Direct

• Indirect

• Alternative

• Alternating

Which statement correctly describes the 2 electrodes?

• They are both negative

• They are both positive

• One is positive and one is negative

• They are both neutral

What is the name given to the solution that is being electrolysed?

• Salty solution

• Electric solution

• Mineral solution

• Electrolyte

It is essential that the electrolyte is a liquid so that...

• Electrons can migrate towards the electrodes.

• Charged ions can migrate towards the electrodes.

• The electrodes can dissolve.

• The circuit is opened.

What happens at the positive electrode?

• Positive ions are attracted

• Negative ions are attracted

The negatively charged ions migrate toward the ________.

• positive electrode

• negative electrode

The positively charged ions migrate toward the ________.

• anode
• cathode

Tags

NGSS.HS-PS3-5

What is the name of the process that uses electricity to separate the elements in a compound?

• reduction
• electrolysis
• extraction
• mining

Why do ionic compounds only conduct electricity when molten or dissolved in water?

• Electrons are shared

• Electrons are free to move

• Ions are free to move