Chemical Tests

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Author:
DeFrenzyPenguin
ID:
244973
Filename:
Chemical Tests
Updated:
2014-04-13 03:34:09
Tags:
Chemistry
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Description:
Chemical Tests
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  1. Ppt of:
    Calcium (Ca2+
    +
    Sodium Hydroxide (NaOH)
    White ppt, insoluble in excess
  2. Ppt of:
    Calcium (Ca2+)
    +
    Ammonia (NH3)
    No ppt or very faint white ppt
  3. Ppt of:
    Zinc (Zn2+)
    +
    Sodium Hydroxide (NaOH)
    White ppt, dissolves in excess to form a colourless solution
  4. Ppt of:
    Zinc (Zn2+)
    +
    Ammonia (NH3)
    White ppt, dissolves in excess to form a colourless solution
  5. Ppt of:
    Aluminium (Al3+)
    +
    Sodium Hydroxide (NaOH)
    White ppt, dissolves in excess to form a colourless soultion
  6. Ppt of:
    Aluminium (Al3+)
    +
    Ammonia (NH3)
    White ppt, insoluble in excess
  7. Ppt of:
    Copper (Cu2+)
    +
    Sodium Hydroxide (NaOH)
    Light blue ppt, insoluble in excess
  8. Ppt of:
    Copper (Cu2+)
    +
    Ammonia (NH3)
    Light blue ppt, dissolves in excess to give a deep blue solution
  9. Ppt of:
    Iron(ll) (Fe2+)
    +
    Sodium Hydroxide (NaOH)
    Green ppt, insoluble in excess
  10. Ppt of:
    Iron(lll) (Fe3+)
    +
    Sodium Hydroxide (NaOH)
    Brown ppt, insoluble in excess
  11. Ppt of:
    Iron (ll) (Fe2+)
    +
    Ammonia (NH3)
    Green ppt, insoluble in excess
  12. Ppt of:
    Iron (lll) (Fe3+)
    +
    Ammonia (NH3)
    Brown ppt, insoluble in excess
  13. Ammonium (NH4+)
    +
    Sodium Hydroxide (NaOH)
    • Ammonia gas given off on warming
    • Turns damp red litmus paper blue
  14. How do you test for:
    Ammonia (NH3)
    Turns damp red litmus paper blue
  15. How do you test for:
    Hydrogen (H2)
    Gives a squeaky pop with a lighted splint
  16. How do you test for:
    Oxygen (O2)
    Relights a glowing splint
  17. How do you test for:
    Carbon Dioxide (CO2)
    Turns limewater cloudy
  18. How do you test for:
    Chlorine (Cl2)
    Bleaches damp litmus paper
  19. How do you test for:
    An Alkene
    Turns Bromine water brown to colourless
  20. How do you test for:
    a Carbonate (CO32-)2
    • Add dilute HCl
    • Effervescence due to CO2 
    • Gas turns limewater cloudy
  21. How do you test for:
    a Chloride (Cl-)
    • Add excess nitric acid
    • Add silver nitrate
    • White precipitate
  22. How do you test for:
    an Iodide (I-)
    • Add excess nitric acid
    • Add silver nitrate
    • Pale yellow precipitate
  23. How do you test for:
    a Nitrate (NO3-)
    • Warm with NaOH and aluminium foil
    • Bubbles of Ammonia gas
    • Pungent smell
    • Turns damp red litmus paper blue
  24. How do you test for:
    Sulphate (SO42-)
    • Add excess HCl
    • Add Barium Chloride
    • White precipitate
  25. What colour does red litmus paper go 
    in a pH below 7?
    Red
  26. What colour does red litmus paper go 
    in a pH of 7?
    Red
  27. What colour does red litmus paper go 
    in a pH above 7?
    Blue
  28. What colour does blue litmus paper go
    in a pH below 7?
    Red
  29. What colour does blue litmus paper go
    in a pH of 7?
    Blue
  30. What colour does blue litmus paper go
    in a pH above 7?
    Blue
  31. What colour does Universal Ind. go
    in a pH below 7?
    Red-Yellow
  32. What colour does Universal Ind. go
    in a pH of 7?
    Green
  33. What colour does Universal Ind. go
    in a pH above 7?
    Blue-Purple
  34. Examples of strong acids?
    • HNO3
    • HCl
    • H2SO4

  35. Examples of weak acids?
    • CH3COOH
    • CO2
  36. Examples of weak alkalis?
    • NH3
    • NaHCO3
  37. Examples of strong alkalis?
    • LiOH
    • NaOH
  38. How do you test for:
    Water
    • Either:
    • Blue cobalt(ll) chloride paper turns pink
    • or
    • White anhydrous copper(ll) sulphate turns blue

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