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Year 11 Mock revision

Last updated 9 months ago
9 questions
6
Electrolysis plays an important part in extracting some metals from their ores e.g. ______________ and in purifying others e.g ___________ . (see diagrams in hints).
a) Define what is meant by the term electrolysis.
Electrolysis is __________________ of a substance using an _____________ current
Which metals are obtained from their ores by electrolysis.
Reactive metals at the ________ of the reactivity series (above ___________) .
Other Answer Choices:
electric
top
copper
carbon
aluminium
decomposition
5
Write balanced, ionic equations to show the electrode reactions which occur when copper is purified.
At the anode (where ______________ takes place) Cu → Cu²⁺ + 2e⁻ At the ____________ (Where reduction takes place) Cu²⁺ + 2e⁻ → Cu)
The mass of the cathode will ______________less than the mass of the anode will _____________ as impurities accumulate below the anode as ___________ .
Other Answer Choices:
decrease
increase
oxidation
sludge
cathode
1
The particles that are responsible for the conductivity of electricity in metals are ______________ The particles that are responsible for the conductivity of electricity in electrolytes are _________
The electrolysis of dilute sulphuric acid using inert electrodes produces two gases as products.

Name a material which could be used as the electrodes in this experiment. _____________
Name the gas formed at the anode ___________ (4OH⁻→ O₂ + 2H₂O + 4e⁻)
Name the gas formed at the cathode _____________ .( 2H⁺ + 2e⁻ → H₂)
Other Answer Choices:
hydrogen
oxygen
electrons
Graphite
ions
4
The term is used to describe a reaction which gives out heat is _______________ .
b) When drops of water are added to anhydrous copper sulphate heat is given out.
Describe what would be observed during this reaction.
The __________ solid would turn blue
The addition of water to anhydrous copper sulphate is called Hydration
The anhydrous copper sulphate can be heated to remove the water of hydration so this reaction is an example of a _______________ reaction.
The forward and reverse reactions are not, however, both occurring at the same rate so this is not an example of ____________ equilibrium.
Other Answer Choices:
Exothermic
reversible
white
dynamic
8
Temperature changes in chemical reactions
Heat is also given out during the reaction of sodium hydroxide with hydrochloric acid.
Give a balanced symbol equation for this reaction.
NaOH + HCl → _________ + H₂O.
The reaction of an acid with an alkali is called ___________________ .
The __________ reaction of zinc with copper sulphate solution also gives out heat. Describe what would be observed during this reaction.
The _________ zinc would become coated with red/ __________ copper metal.
The _________ copper sulfate solution colour fades and zinc disappears
The formula for this _________________ and redox reaction is
Zn + CuSO₄ → __________ + Cu
Other Answer Choices:
brown
ZnSO₄
redox
Neutralisation
blue
grey
NaCl
displacement
1

Changing conditions for the Haber process
N₂ + 3H₂ ⇌ 2NH₃
Exothermic in the forward direction.

  • NH₃ is removed
  • N₂ is added
  • H₂ is added
  • Pressure is increased (4:2)
  • Temperature decreased
  • NH₃ is added
  • N₂ is removed
  • H₂ is removed
  • Pressure is decreased
  • higher temperature
  • Fe Catalyst added
  • Shifts equilibrium to the left
  • Shifts equilibrium to the right
  • No change
1
Solid lead (II) bromide does not conduct when solid as the _________ are not free to move in the electrolyte.

This is described as oxidation because the Bromide ions have lost ______________ .
Other Answer Choices:
ions
electrons
1
https://www.sciencephoto.com/media/718050/view/electrolysis-of-molten-lead-bromide
Pb²⁺ + ________ → _______
The product would be ___________ coloured lead liquid.
Other Answer Choices:
Pb
silver
2e⁻
3
Note answer to 3 sig figs.
a) _______ (RFM = 18)
b) _______ (RFM = 58)
c) _______ (RFM = 17)