Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account



The use of electricity to bring about a chemical reaction


Liquid in which electrolysis takes place. Usually an ionic solution but it can also be a fused [melted] ionic compound

Direct current

Provides the energy necessary to create or discharge the ions in the electrolyte


Electrical conductors which link between the electrical circuit and the electrolyte


Electrodes which do not react with the electrolyte e.g. Graphite and Platinum


Electrodes which react with electrolyte e.g. Copper and Iron


Positive electrode. Positive because the battery sucks electrons out of it.


Negative electrode. Negative because the battery pumps electrons into it.


Negative ion. Named because it is attracted to the opposite charge of the anode


Positive ion. Named because it is attracted to the opposite charge of the cathode


Reaction at cathode

H2O + 2 e- --> H2 + 2OH-

Equation at cathode

Hydrogen (H2)

Gas released at cathode

Base (OH- ions)

Acid or base at cathode


Reaction at anode

2H2O --> O2 + 4H+ + 4e−

Equation at anode

Oxygen (O2)

Gas released at anode

Acid (H+ ions)

Acid or base at anode


Electrodes used for electrolysis of Sodium Sulphate and Universal Indicator


Colour at Cathode with Sodium Sulphate and Universal Indicator


Colour at Anode with Sodium Sulphate and Universal Indicator


Colour at Cathode with Potassium Iodide and Phenolphthalein


Colour at Anode with Potassium Iodide and Phenolphthalein

2I- --> I2 + 2e-

Equation at anode due to the oxidation of KI to brown Iodine


The process of covering the cathode in metal


Electrode which loses mass as copper dissolves off

Cu --> Cu2+ + 2e-

Equation at anode during copper electroplating


Electrode which gains mass as Cu is deposited on it

Cu2+ + 2e- --> Cu

Equation at cathode during copper electroplating

Electrode potential

The tendency of a metal to lose electrons, i.e. the tendency for a metal to be oxidised

Electrochemical series

A list of elements in order of their standard electrode potentials: Pretty Sally Could Marry A Zulu In Lovely Honolulu Causing Many Strange Gazes (except for calcium)

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording