Molten substances
Which electrode is positively charged?
Anode
What is concentrated sodium chloride solution called?
Brine
What two reasons are given for electroplating metals?
Prevent corrosion and improve appearance
Define reduction in terms of loss/gain of oxygen
Loss
In what year was the first iphone released?
2007
What is the name of the substance being electrolysed?
Electrolyte
Why do molten and dissolved ionic substances conduct electricity?
Ions are free to move
Which electrode does the object being electroplated need to be connected as?
Cathode
Where does reduction take place in electrolysis?
Cathode
What is the strongest muscle in the human body?
Jaw muscle (masseter muscle)
What is produced at the cathode in the electrolysis of molten sodium chloride?
Sodium metal
What is produced at the cathode during the electrolysis of aqueous sodium chloride?
Hydrogen gas
A piece of jewelry is being electroplated with silver. Suggest a suitable electrolyte.
Silver nitrate or sulphate
Define oxidation in terms of loss/gain of electrons
Loss of electrons
Which country drinks the most coffee per capita?
Finland
What is produced at the anode in the electrolysis of molten lead bromide?
Bromine
What is produced at the anode during the electrolysis of aqueous sodium chloride solution?
Chlorine gas
What happens to the concentration of cations in solution during electroplating if the anode is not made of the metal being electroplated?
Concentration decreases
What happens to a reducing agent during a redox reaction?
It becomes oxidised
What instrument does Lizzo play?
The Flute
On a mini white board write the half equation for the reduction of aluminium at the cathode during electrolysis
Al3+ + 3e- --> Al
Give the half equation for the formation of chlorine gas during the electrolysis of aqueous sodium chloride solution
2Cl- --> Cl2 + 2e-
Give the half equation for the electroplating of an object with copper.
Cu2+ + 2e- --> Cu
When constructing half equations for redox reactions, do you place e- in the reactants or products for an oxidation reaction?
Products (right)
Who painted the ceiling of the Sistine Chapel?
Michelangelo