1 / 9

AS Chemistry cation identification tests a visual guide

AS Chemistry cation identification tests a visual guide. Designed by Samuel Millar. KEY. suspected aqueous cation (colour indicated). precipitate. solution. smoke. reagent solution:. {. NaOH (aq) sodium hydroxide solution NH 3 (aq) ammonium hydroxide solution

cliff
Télécharger la présentation

AS Chemistry cation identification tests a visual guide

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. AS Chemistrycation identification testsa visual guide Designed by Samuel Millar

  2. KEY suspected aqueous cation (colour indicated) precipitate solution smoke reagent solution: { NaOH (aq) sodium hydroxide solution NH3 (aq) ammonium hydroxide solution KSCN(aq) potassium thiocyanate solution K2CrO4(aq) potassium chromate solution

  3. NH3 (aq)(add dropwise) NaOH (aq) COPPER (II) Cu2+(aq) Cu2+(aq) pale blue ppt insoluble in excess pale blue ppt soluble in excess: deep blue soln(complex ion solution)

  4. NH3 (aq) or NaOH (aq) KSCN (aq) IRON (III) Fe3+(aq) Fe3+(aq) blood red soln (complex ion solution) rust-brown ppt insoluble in excess

  5. NH3 (aq) or NaOH (aq) IRON (II) Fe2+(aq) dirty green ppt insoluble in excess

  6. KCrO4 (aq) BARIUM (II) Ba2+(aq) yellow ppt soluble in hydrochloric acid: yellow soln

  7. NaOH(aq) AMMONIUM NH4+(aq) HEAT pungent colourless gas evolved reacts with hydrogen chloride vapour: white smoke

  8. ALUMINIUM (III), ZINC (II), MAGNESIUM (II)These cations all produce white precipitates with NaOH and NH3 solutions. The precipitates have the following solubilities in excess: Al3+(aq) Zn2+(aq) Mg2+(aq) NH3 (aq) soluble: colourless soln (complex ion soln) insoluble insoluble NaOH (aq) soluble: colourless soln (ppt amphoteric) soluble: colourless soln (ppt amphoteric) insoluble

  9. FLAME TESTS

More Related