Uploaded by Simon Jackson

Electrolysis-flow-chart

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Molten
Anode
(+ve)
Electrolyte
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Molten
Anode
(+ve)
NaCl(l)
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Molten
Anode
(+ve)
NaCl(l)
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Molten
Anode
(+ve)
NaCl(l)
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Molten
Anode
(+ve)
NaCl(l)
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Molten
Anode
(+ve)
NaCl(l)
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Molten
Anode
(+ve)
NaCl(l)
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Chlorine
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Sodium
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Molten
Anode
(+ve)
NaCl(aq)
Solution
left
Is the
electrolyte
molten or
dissolved?
Dissolved (aq)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Solution
left
NaCl(aq)
Is the
electrolyte
molten or
dissolved?
Molten
Anode
(+ve)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Contains
(H+, Na+, Cl-, OH-)
Dissolved (aq)
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Solution
left
NaCl(aq)
Is the
electrolyte
molten or
dissolved?
Molten
Anode
(+ve)
Cathode
(-ve)
Yes
Nonmetal
formed
Made from ions
unused.
Contains
(H+, Na+, Cl-, OH-)
Dissolved (aq)
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
No
Yes
No
Metal
formed
Halogen
formed
(Cl2, Br2,
I2 )
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Solution
left
NaCl(aq)
Is the
electrolyte
molten or
dissolved?
Molten
Anode
(+ve)
Cathode
(-ve)
Made from ions
unused.
Contains
(H+, Na+, Cl-, OH-)
Dissolved (aq)
Anode
(+ve)
Cathode
(-ve)
Is the nonmetal a
halide (in
group 7)?
Is the metal
more reactive
than
hydrogen?
It is chloride
Yes
Nonmetal
formed
No
Yes
No
Metal
formed
Chlorine
formed
(Cl2)
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Solution
left
NaCl(aq)
Is the
electrolyte
molten or
dissolved?
Molten
Anode
(+ve)
Cathode
(-ve)
Contains
(H+, Na+, Cl-, OH-)
Dissolved (aq)
Anode
(+ve)
It is chloride Is the nonmetal a
halide (in
group 7)?
Yes
Nonmetal
formed
Made from ions
unused.
Cathode
(-ve)
Sodium is
much
more
reactive
No
Is the metal
more reactive
than
hydrogen?
Yes
No
Metal
formed
Chlorine
formed
(Cl2)
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Solution
left
NaCl(aq)
Is the
electrolyte
molten or
dissolved?
Molten
Anode
(+ve)
Cathode
(-ve)
Contains
(H+, Na+, Cl-, OH-)
Dissolved (aq)
Anode
(+ve)
It is chloride Is the nonmetal a
halide (in
group 7)?
Yes
Nonmetal
formed
Made from ions
unused.
Cathode
(-ve)
Sodium is
much
more
reactive
No
Is the metal
more reactive
than
hydrogen?
Yes
No
Metal
formed
Chlorine
formed
(Cl2)
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
Solution
left
NaCl(aq)
Is the
electrolyte
molten or
dissolved?
Molten
Anode
(+ve)
Cathode
(-ve)
Contains
(H+, Na+, Cl-, OH-)
Dissolved (aq)
Anode
(+ve)
It is chloride
Yes
Nonmetal
formed
Na+ + OH-  NaOH(aq)
Is the
non-metal
a halide (in
group 7)?
Cathode
(-ve)
Sodium is
much
more
reactive
No
Is the metal
more reactive
than
hydrogen?
Yes
No
Metal
formed
Chlorine
formed
(Cl2)
Oxygen
formed
(O2)
Hydrogen
formed
Metal
formed
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