6.1 electrolyte& non electrolyte

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6.1 electrolyte& non electrolyte

  1. 1. ELECTROCHEMISTRY
  2. 2. ELECTROLYTE A substance that can conduct electricity when they are in molten state or aqueous solution and undergo chemical changes
  3. 3. A liquid is electrolyte if : • It contains charged particles (ionic compounds) • Its charged particles are free to move through it
  4. 4. ELECTROLYTE • When there are solution, aqueous, dilute or molten of ionic substances NON-ELECTROLYTE • When there are glacial, pure, anhydrous of ionic substances. • When it is a covalent compound
  5. 5. Electrolyte • Example • - Molten salts : molten lead(II) bromide • - Solution of salt in water : sodium chloride solution • - Solution of acid in water : aqueous hydrochloric acid • - Solution of alkali in water : aqueous sodium hydroxide
  6. 6. Electrolyte • Example • - Aluminium, Zinc, Copper and all metals can conduct electricity but chemically unchange. • - Copper(II) sulphate solution • - Aqueous Argentum sulphate • - dilute Zinc nitrate
  7. 7. Please notice what happen to the ammeter. Batteries + ammeter 0 electrolytes What made the needle of the ammeter moves? 10
  8. 8. NON-ELECTROLYTE Substance that cannot conduct electricity either in molten state or aqueous solution
  9. 9. • Non-Electrolyte cannot conduct electricity in molten state or aqueous solution because they do not have ions • Examples : > sulphur > wood > naphthalene > sugar
  10. 10. Non-Electrolyte • • • • • Example - Pure ethanol - Glacial ethanoic acid - Latex - Glucose
  11. 11. Please notice what happen to the ammeter. Batteries + ammeter 0 Non-electrolytes Why the needle of the ammeter did not move? 10
  12. 12. FREE MOVING ION • When the ionic bonds are broken, there will be free movements of positive and negative ions • This will happened if ionic compounds : • Melts • Dissolve in water • When the electricity is flow to the electrode, positive ions are attracted to cathode and negative ions are attracted to anode. • The flow of electrical charge carried by ions in electrolyte and electrons in the connected wire. • The electrolyte which has freely moving ions is able to conduct electricity.
  13. 13. Please notice what happen to the ammeter. Batteries + ammeter 0 electrolytes What made the needle of the ammeter moves? Freely moving ions 10
  14. 14. ANION AND CATION ANION -Negatively Charge Particles -Attracted to anode -Example -Nitrate ion NO3-Sulphate ion SO42-Chloride ion , Cl-Iodide ion , I-Bromide ion, Br-Carbonate ion, CO32- CATION -Positively Charge Particles -Attracted to cathode -Example -Ammonium ion NH4+ -Sodium ion Na+ -Copper(II) ion , Cu2+ -Copper(I) ion , Cu+ -Aluminium ion, Al3+ -Magnesium ion, Mg2+
  15. 15. Mind Map Electrolytes Non-electrolytes What we have learn today? Freely Moving Ion
  16. 16. THE END

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