C6 - Electrolysis Flashcards
What does the word Electrolysis actually mean?
Breaking down using Electricity.
In Electrolysis, you use an Electric _______ to break down an Ionic ________.
Current…Compound…
What is the Compound called that is broken down using Electrolysis?
The Electrolyte.
To set up an Electrical Circuit for Electrolysis, you dip two _________ into the __________ with a gap between them.
Electrodes…Electrolyte…
What are Electrodes?
Conducting Rods.
One of the Electrodes is connected to the Positive Terminal called the _____.
Anode.
One of the Electrodes is connected to the Negative Terminal is called the ________.
Cathode.
What are Electrodes usually made up of?
Graphite.
The Electrodes do not react with the ___________ or any product made in ____________.
Electrolyte…Electrolysis…
During Electrolysis, Positively Charged ____ move to the Cathode (Negative _________) and Negatively Charged ____ move to the Anode (________ Electrodes) because opposites attract.
Ions…Electrode…Ions…Positive…
When Ions reach the Electrodes, they lose charge and become ________.
Elements.
What happens at the Electrode?
Gases are given off.
Why do Ionic Compounds not conduct Electricity when they are Solid?
Because the Ions are fixed in their position and can’t move.
Ionic Substances have very ____ Melting Points.
High.
Some Ionic Substances are able to Dissolve in _____.
Water.
Covalent Compounds cannot usually be Electrolysed unless they react in ______ to form ____.
Water…Ions…
What is another word for Water in Electrolysis?
Aqueous Solution (Aq).
At the Electrode, Negatively Charged ____ Lose __________ to become Neutral Atoms.
Ions…Electrons…
At the Electrode, Positively ________ Ions ____ Electrons to become Neutral Atoms.
Charged…Gain…
Gaining Electrons is called __________.
Reduction.
Losing Electrons is called __________.
Oxidation.
What does OILRIG stand for?
Oxidation Is Loss, Reduction Is Gain.
Electrolysis is more Complex in ________ Solutions (Aq), because Ions form by Water.
Aqueous.
When Electrolysis happens in an Aqueous Solution (__), either Hydrogen or the Metal is produced at the Cathode, and at the _____ you get either Oxygen or a Halogen.
(Aq)…Anode…
Three Examples of the uses of Aluminium?
Pans, Cooking Foil and Drink Cans.
Is Aluminium a Reactive Metal?
Yes.
You get Aluminium _____ from the Ore called Bauxite.
Oxide.
The Electrolysis of Aluminium Oxide (_______) requires a lot of _______.
Bauxite…Energy…
Aluminium Oxide has a ____ Melting Point.
High.
What do Chemists mix Aluminium Oxide with?
Molten Cryolite.
During the Electrolysis of Aluminium Oxide, Aluminium forms at the _______, and _______ forms at the Anode.
Cathode…Oxygen…
What is Brine?
A Concentrated Sodium Chloride Solution.
The Electrolysis of Brine is a very important _____________ process.
Industrial.
What are the Three useful products you get when Brine is Electrolysed?
Chlorine Gas, Hydrogen Gas and Sodium Hydroxide.
What is Sodium Hydroxide, an Acid or Alkali?
Alkali.
What is produced at the Cathode during the Electrolysis of Aqueous Solution?
Hydrogen.
What is produced at the Anode during the Electrolysis of Aqueous Solution?
Chlorine.
How can you test the Solution at the Cathode/Anode?
Using an Acid/Base Indicator.
