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Chemistry Revision. Neutralisation & Electrolysis. Neutralisation. Neutralisation occurs when an Acid reacts with an Alkali Examples of Acids: Hydrochloric acid HCl Sulphuric Acid H2SO4 Nitric Acid HNO3 Examples of Alkalis: Sodium Hydroxide NaOH Ammonia NH3NH4OH.

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chemistry revision

Chemistry Revision

Neutralisation & Electrolysis

neutralisation
Neutralisation
  • Neutralisation occurs when an Acid reacts with an Alkali
  • Examples of Acids:
    • Hydrochloric acid HCl
    • Sulphuric Acid H2SO4
    • Nitric Acid HNO3
  • Examples of Alkalis:
    • Sodium Hydroxide NaOH
    • Ammonia NH3NH4OH
neutralisation example
Neutralisation Example
  • Acid + Alkali = Salt + Water
    • Hydrochloric Acid + Sodium Hydroxide = Neutral solution of Sodium Chloride + Water
      • HCl + NaOH = NaCl + H2O
electrolysis
Electrolysis
  • Electrolysis is the decomposition of an ionic compound using Electricity
    • A current is passed through the molten compound via a cathode (negative electrode) and anode (positive electrode)
    • Positive ions travel to the cathode
    • Negative ions travel to the anode
    • As a result the original compound is decomposed
electrolysis example
Electrolysis Example
  • Sodium Chloride solution NaCl decomposed using Electrolysis gives the following result:
    • The positive Na ions are attracted to the cathode2Na+ + 2e- = 2Na
    • The negative Cl ions are attracted to the anode2Cl- = Cl2 + 2e-
    • 2NaCl = 2Na liquid + Cl2 gas