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Organic Analysis Techniques for Functional Group Identification

This guide focuses on identifying organic groups through characteristic tests. Using a simple 3x2 grid, a variety of organic compounds such as alkenes, alcohols, and carboxylic acids can be assessed. Key tests include shaking with bromine water, reacting with sodium hydrogen carbonate, and using Fehling’s solution. Each test provides distinct results, like the disappearance of red-brown color or precipitation, which help identify the presence of specific functional groups. For a more comprehensive understanding, refer to Table 1 on page 129.

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Organic Analysis Techniques for Functional Group Identification

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  1. Organic analysis L.O. Be able to identify organic groups

  2. Look at table 1. page 129.

  3. Analysis Bingo Draw a 3x2 grid: Enter in each grid any of these: Alkene, RCl, ROH, RCOOH , RCOCl, RCHO, RBr, RI,

  4. Test 1: Shake with bromine water Result 1: Red-brown colour disappears Test 2: Add sodium hydrogencarbonate solution Result 2: Solution does not fizz.

  5. Test: Add AgNO3(aq) Result white precipitate

  6. Test 1: Shake with bromine water Result 1: Red-brown colour disappears Test 2: Add sodium hydrogencarbonate solution Result 2: Solution fizzes.

  7. Test: Fehling’s solution. Result: Blue colour turns to red precipitate

  8. Test: • Add NaOH • HNO3 • AgNO3(aq) Result: Cream solid. Dissolves with NH3

  9. Test 1: Tollen’s solution Result 1: No silver mirror • Test 2: Add acidified K2Cr2O7 Result 2: Orange colour turns green

  10. Page 130. Q1

  11. Q2

  12. Q3

  13. Q4

  14. Q5

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