Electrochemistry Flashcards
Define a redox reaction.
A redox reaction is defined as a reaction involving the transfer of electrons.
Define oxidation.
Oxidation is defined as the loss of electrons.
Define reduction.
Reduction is defined as the gain of electrons.
Define oxidising agent.
An oxidising agent is defined as the substance that accepts electrons.
Define reducing agent.
A reducing agent is defined as the substance that donates electrons.
Define anode.
The anode is defined as the electrode where oxidation takes places.
Define cathode.
Cathode is defined as the electrode where reduction takes place.
Define an electrolyte.
An electrolyte is defined as a substance that can conduct electricity by forming free ions when molten or when dissolved in solution.
What do electrolytic cells do?
They convert electrical energy(from the power supply) to chemical energy (in the products produced).
List three applications of electrolytic cells.
Electrolysis.
Electroplating objects with unreactive metals.
Electro-refining metal ores.
Describe electrolysis.
Electrolysis is the use of electricity to chemically decompose a compound into its component elements.
What are the standard conditions for electrolytic cells?
25°C. 1mol/dm^3 solutions. 1 atmosphere pressure.
How does concentration change an E°/volt value?
The reactions on the SEP table are done in equilibrium, if concentration is increased then the oxidation will be favoured, thus the value can change by about 0.3
What is brine?
Brine is am aqueous solution of Concentrated sodium chloride.
