1 / 9

Inquiry-based Chemistry Experiments

Inquiry-based Chemistry Experiments. To identify 4 unlabelled white solids : 3 of them are known to be sodium sulphate , citric acid , & sodium hydrogencarbonate . 1 unknown ( ammonium chloride or potassium chloride ). Given :

kalb
Download Presentation

Inquiry-based Chemistry Experiments

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. Inquiry-based Chemistry Experiments

  2. To identify 4 unlabelled white solids : 3 of them are known to be sodium sulphate , citric acid , & sodium hydrogencarbonate. 1 unknown (ammonium chloride or potassium chloride) Given : dil. & conc. HCl, dil. NaOH, lime water, AgNO3(aq) , KMnO4 / H+(aq), Mg ribbon , Pt wire , Bunser burner & common apparatus * Special items will be provided upon request

  3. Example 1 5 unlabelled compounds (3 white solids and 2 colourless solutions) known to be : NaCl , Na2CO3 , citric acid, HNO3 , H2SO4 Task : To identify the compounds Given : Cu metal

  4. 3 white solids & 2 colourless solutions : NaCl , Na2CO3 , citric acid, HNO3 , H2SO4 (Given : Cu metal) Add Cu Brown Gas & blue solution No Gas H2SO4 HNO3

  5. NaCl , Na2CO3 , citric acid  Add HNO3 or H2SO4 Gas No Gas Na2CO3 NaCl or citric acid Add Na2CO3 Gas No Gas Citric acid NaCl

  6. Example 2 4 colourless liquids are known to be : a liquid alkane ; ethanol a liquid alkene ; ethanoic acid Task : To identify the 4 unlabelled compounds Given : solid Na2CO3 , acidified KMnO4 solution

  7. liquid alkane , liquid alkene, ethanol, ethanoic acid Given : solid Na2CO3 , KMnO4 / H+ solution Add Na2CO3 Gas No Gas ethanol , alkane , alkene ethanoic acid Add KMnO4 / H+ No decolourization Decolourize alkene ethanol, alkane

More Related