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WorksheetsElectrolysis
Total questions: 17
Worksheet time: 9mins
Which of these is an anion?
Cl-
Cl2
Na
Na+
Which of these is a cation?
Cl-
Cl2
Na
Na+
A solution which conducts electricity is called...
electrode
anion
electrolyte
cathode
The negative electrode is called...
anion
cation
anode
cathode
Which ions are present in molten magnesium bromide?
Mg+ and Br-
Mg2+ and Br-
Mg2+ and Br2-
Mg2+ and Br2-
What are the products when molten sodium oxide is electrolysed?
Na2 and O2
Na+ and O2-
Na and O
Na and O2
Which process could happen at the cathode?
Na+ + e- → Na
2 O2- → O2 + 4 e-
Which process could happen at the anode?
Na+ + e- → Na
2 O2- → O2 + 4 e-
Which ions are present in sodium chloride solution?
Na+ and Cl- only
Na and Cl2
Na+, Cl-, H+ and OH-
Na, Cl2 and H2O
Sodium is higher than lead in the reactivity series. If both sodium and lead cations were present in a solution, which would discharge at the cathode?
Sodium
Lead
In sodium chloride solution, there are two cations present: Na+ and H+. Which will discharge at the cathode?
Na+ to make Na metal
H+ to make H2 gas
In sodium chloride solution, there are two anions present: Cl- and OH-. Which will discharge at the anode?
Cl- to make Cl2 gas
OH- to make O2 gas
What are the products when copper chloride solution is electrolysed?
Cu and Cl2
Cu and O2
H2 and O2
H2 and Cl2
What are the products when sodium sulfate solution is electrolysed?
Na and S
Na and O2
H2 and O2
H2 and S
What does amphoteric mean?
Acts as an acid
Acts as a base
Acts as an alkali
Acts as both an acid and a base
What is the name of aluminium ore?
Alumina
Bauxite
Cryolite
Dihydrogen monoxide
What does a flocculant do?
Help crystals grow
Filter out unwanted particles
Act as both an acid and a base
Help small particles clump together so they settle out
