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BBS C2 Ionic Compounds and Analysis

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  1. What is an ion?
    An atom that has lost or gained electrons
  2. What happens to the electrons in an Ionic bond?
    They are TRANSFERRED (lost or gained)
  3. What elements does an ionic bond happen between?
    Metals and Non-metals e.g MgO
  4. What type of atoms lose electrons during ionic bonding?
    Metals
  5. What type of atoms gain electrons during ionic bonding?
    Non-metals
  6. What happens to a magnesium atom during ionic bonding if it has the electronic configuration 2.8.2?
    It loses 2 electrons to become a 2+ ion
  7. What happens to an oxygen atom during ionic bonding if it has the electronic configuration 2.6?
    It gains 2 electrons to become a 2- ion
  8. What is a cation?
    A positive ion
  9. What is an anion?
    A negative ion
  10. What is an ionic bond?
    An electrostatic force of attraction between oppositely charged ions
  11. What type of melting and boiling points do ionic substances have?
    HIGH (very strong bonds which require a lot of energy to break)

    Tip: always go for the highest option!
  12. When can ionic substances conduct electricity and why?
    When molten or dissolved because the IONS are free to move
  13. When can ionic substances not conduct electricity and why?
    When solid because the ions are not free to move
  14. How do you prepare a pure, dry insoluble salt and what is the name of the reaction?
    • Mix the solutions
    • Filter the precipitate
    • Wash with distilled water
    • Place in an oven to dry
    • This is a Precipitation Reaction
  15. Why is Barium Sulfate safe, despite being toxic?
    It is insoluble, so does not dissolve in the bloodstream
  16. How do you carry out a flame test?
    • Place the wire loop in HCl acid to clean
    • Dip the wire loop in the substance
    • Place the wire loop IN the flame
  17. What colour are the following metal ions in a flame?
    Sodium
    Potassium
    Copper
    Calcium
    • Sodium - yellow/orange
    • Potassium - lilac
    • Copper - blue-green
    • Calcium brick-red
  18. How do you test for carbonate ions - CO32-?
    • React with dilute acid to form CO2
    • Bubble through limewater
    • Limewater goes cloudy
  19. How do you test for Sulphate ions, SO42-?
    • Add dilute HCl acid
    • Then barium chloride solution
    • Observe a white precipitate
  20. How do you test for Chloride ions, Cl-?
    • Add dilute nitric acid
    • Then silver nitrate solution
    • Observe a white precipitate
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Author
across2015
ID
331669
Card Set
BBS C2 Ionic Compounds and Analysis
Description
BBS C2 Ionic Compounds and Analysis
Updated

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