Basic Concepts
What is electrolysis
The decomposition of an Ionic compound using electricity
Name all of the ions present in a solution of aqueous sodium chloride.
Na+, Cl-, H+, and OH-.
What is produced at the anode in molten sodium chloride electrolysis?
Chlorine Gas (Cl2)
do not accept any ions.
What is your favourite subject at school?
Any subject is valid, but 500 points if they put Chemistry
Water
H2O
Define an electrolyte.
The compound that is being electrolysed
What is produced at the cathode in copper (II) sulfate electrolysis?
Copper metal (Cu)
do not accept Cu2+ or any ion.
What is produced at the cathode in molten lead (II) bromide electrolysis?
Lead metal (Pb)
do not accept any ions
The mass of hydrogen is
One
Carbon dioxide
CO2
Name the two types of electrodes (identify each correctly)
Anode (positive)
Cathode (negative)
What gas is produced at the anode in dilute sulfuric acid electrolysis?
Oxygen gas (O2)
do not accept any ions.
What does the word Inert mean?
Unreactive.
The mass of water is
18
Ammonia
NH3
What material can inert electrodes be made of?
Platinum or graphite
Write the half equation for OH- when it goes to the Annode
4OH- -------> 2H2O + O2 + 4e-
Give me a Molten compound that will produce bromine gas at the Anode
Any compilation, as long as the ratio is ok
Complete and balance:
CaCO3 + H3PO4 ---------->
3CaCO3 + 2H3PO4 ----------> 3CO2 + 3H2O + Ca3(PO4)2
Hydrogen Peroxide
H2O2
Why can molten ionic compounds conduct electricity?
Their ions are free to move to the electrodes.
Draw the setup for electroplating a knife with Gold
Electrolyte, electrodes choosen correctly
Write the half equation for H+ when it goes to the cathode during the eletrolyisis of molten sodium chloride?
trick question! muahaha
No H+ present in molten NaCl, so sodium metal will form at the cathode.
The formula of potassium nitrate is
KNO3
What is the equation of a fuel cell
H2 + O2 ------> 2H2O