E-learning Identification of ions and gases

Uploaded on


  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads


Total Views
On Slideshare
From Embeds
Number of Embeds



Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

    No notes for slide
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning
  • E-learning


  • 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. 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. 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. 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. 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. 3. Identification of IonsTesting for Cations
  • 7. 3. Identification of Ions Testing for Cations• Cations can be identified with aqueous sodium hydroxide.
  • 8. 3. Identification of IonsTesting for Cations• Cations can be identified with ammonia solution.
  • 9. 3. Identification of IonsTesting for Anions• Anions are negatively-charged ions.• Tests for carbonate, chloride, iodide and sulfate often involves precipitation reactions.
  • 10. 3. Identification of IonsTesting for Anions Testing for two anions: (a) carbonate and (b) iodide
  • 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. 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. 4. Testing for Gases and Water Testing for Gases sulfite +acid mixture Testing for sulfur dioxide gas
  • 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