Qualitative analysis of some anions and organic functional groups. DOCX

Title	Qualitative analysis of some anions and organic functional groups.
Author	Meharaj Mahmmud
Pages	2
File Size	16.9 KB
File Type	DOCX
Total Downloads	5
Total Views	156

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Name of the Experiment: Qualitative analysis of some anions and organic functional groups. Introduction. For establishing the presence of a compound in an unknown mixture, you need to run a reaction with clear visual effect. The best kind of effect is the change of color of the solution or formation of the colored precipitate. The formation of colorless (white) precipitate is a little more difficult to detect. The formation of gas (some bulbs inside the solution) can be a possible option as a visual effect. Apparatus: Conical flask, Burette, Pipette, Dropper, Heater. Anions and Functional Groups: Cl- , Br- , SO4 2- , CO3 2- , COOH- , >C=O . Procedures: SO4 2- : In 5 mL of the SO4 2- , add 1-2 mL of HCl (diluted) solution and 1mL BaCl2. Then the formation of the white precipitate indicates the presence of SO4 2- . Ba2+ + SO4 2- BaSO4 Phosphate and carbonate do not react in the presence of HCl. CO3 2- : To the 5-10 drops of an acid (HCl) add some CO3 2- . This will make bubbles of Carbon Di-Oxide. CO3 2- + HCl CO2 Cl- : In 2 mL of Cl- and 1 mL diluted HNO3 solution add 0.5 mL of AgNO3. Ag+ + Cl- AgNO3+ NaCl AgCl + NaNO3 The color of AgCl is White ....