E-learning Identification of ions and gases

9,605 views

Published on

Published in: Education, Business, Technology
0 Comments
10 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
9,605
On SlideShare
0
From Embeds
0
Number of Embeds
5
Actions
Shares
0
Downloads
0
Comments
0
Likes
10
Embeds 0
No embeds

No notes for slide
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning Identification of ions and gases

    1. 1. 1. Introducing Chemical Analysis• Qualitative analysis is used to identify chemical species (elements, compounds and ions) present in an unknown substance.• Quantitative/Volumetric analysis is used to determine the amount or concentration of these chemical species (elements, compounds and ions) present.
    2. 2. 2. Use of Physical Tests to Identify Substances• Additional tests are needed to identify a substance: – Colour – Smell – Solubility in water – pHCalcium compounds Solid copper(II) Aqueous iron(III) ions areare white. sulfate is blue. yellow-orange.
    3. 3. 3. Identification of IonsTesting for Cations• Cations are positively-charged ions.• Aqueous sodium hydroxide and aqueous ammonia can be used to identify cations in salts.• Cations can be identified: – From the colour of the precipitate, and A precipitate of zinc – If the precipitate dissolves in excess hydroxide alkali. Identifying an ammonium compound.
    4. 4. Test for ammonium ions, NH4+http://www.youtube.com/watch?v=b28pw1q2qdo&feature=relatedTest for calcium ions, Ca2+http://www.youtube.com/watch?v=AvnLlWVOa44&feature=relatedTest for lead(II) ions, Pb2+http://www.youtube.com/watch?v=CPnG4OKxgEQ&feature=relatedTest for zinc ions, Zn2+http://www.youtube.com/watch?v=JjPNDnoxYN4&feature=relatedTest for aluminium ions, Al3+http://www.youtube.com/watch?v=D3s-_0xUS-k&feature=relatedTest for copper(II) ions, Cu2+http://www.youtube.com/watch?v=KLGRf4AdKQM&feature=relatedTest for iron(II) ions, Fe2+http://www.youtube.com/watch?v=bivr2CzlTF4&feature=relatedTest for iron(III) ions, Fe3+http://www.youtube.com/watch?v=gj7ju9wRtdY&feature=related
    5. 5. Using aqueous sodium hydroxide to distinguish:sodium, potassium and ammonium ionshttp://www.youtube.com/watch?v=kAnEzELqfjQ&feature=youtu.becalcium, aluminium, lead and zinc ionshttp://www.youtube.com/watch?v=cxOjcN_G4zg&feature=youtu.beiron(II), iron(III) and copper(II) ionshttp://www.youtube.com/watch?v=iKQ-uPqx4n4&feature=youtu.beUsing aqueous ammonia to distinguish:sodium, potassium and calcium ionshttp://www.youtube.com/watch?v=G0lYQH4OVqA&feature=youtu.bealuminium, lead(II) and zinc ionshttp://www.youtube.com/watch?v=UjLBaKZZ_2k&feature=youtu.beiron(II), iron(III) and copper(II) ionshttp://www.youtube.com/watch?v=xaRPwuAOqpc&feature=youtu.be
    6. 6. 3. Identification of IonsTesting for Cations
    7. 7. 3. Identification of Ions Testing for Cations• Cations can be identified with aqueous sodium hydroxide.
    8. 8. 3. Identification of IonsTesting for Cations• Cations can be identified with ammonia solution.
    9. 9. 3. Identification of IonsTesting for Anions• Anions are negatively-charged ions.• Tests for carbonate, chloride, iodide and sulfate often involves precipitation reactions.
    10. 10. 3. Identification of IonsTesting for Anions Testing for two anions: (a) carbonate and (b) iodide
    11. 11. Test for carbonate ions, CO32−http://www.youtube.com/watch?v=197iyKaRhtA&feature=relatedTest for sulfate ions, SO42−http://www.youtube.com/watch?v=oEXYjqSUg4g&feature=relatedTest for chloride ions, Cl−http://www.youtube.com/watch?v=vcQXdeL-juM&feature=relatedTest for iodide ions, I−http://www.youtube.com/watch?v=lw5VUL4-O8M&feature=relatedTest for nitrate ions, NO3−http://www.youtube.com/watch?v=NyB5XfbSwSo&feature=channel
    12. 12. Test for halides (Cl−, I−) using dilute nitric acid andaqueous silver nitratehttp://www.youtube.com/watch?v=C2Lh48zAyqk&feature=youtu.beTest for halides (Cl−, I− ) using dilute nitric acid andaqueous lead(II) nitratehttp://www.youtube.com/watch?v=xAsHDFfCR14&feature=youtu.be
    13. 13. 4. Testing for Gases and Water Testing for Gases sulfite +acid mixture Testing for sulfur dioxide gas
    14. 14. 4. Testing for Gases and WaterTesting for Water• Test liquid with a piece of blue anhydrous cobalt(II) chloride paper.• Water turns blue anhydrous cobalt(II) chloride paper pink. Test for water

    ×