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Determination of Boiling point of organic compounds

Aim:

To determine Boiling point of given liquid sample

Apparatus:

Glassware:

Thiel’s tube, Thermometer,Thread/Rubberring, capillary tube

Chemicals:

Liquid paraffin (Note: If liquid paraffin is not available, melting point can be determined by using concentrated sulphuric acid with caution.)

Theory:

Boiling point of liquid is that temperature at which vapour pressure of liquid equals to atmospheric pressure Boiling point is employed as criterion for identity and purity of liquid organic substance.

Procedure:

1. Fill the Thiel’s tube with liquid paraffin to more than 50% capacity of main limb and clamp it.

2. Seal one end of capillary so that there is no opening left.

3. Place about 3-4 drops of liquid in the boiler tube filling it to a height of 8-10 mm

4. Insert the capillary, open end down in liquid containing in the boiler tube.

5. Attach the boiler tube to thermometer bulb with the help of thread and suspend it in Thiel’s tube.

6. Heat the Thiel’s tube gradually with low flame.

7. When bubbling from capillary initiates, discontinue heating. There will be steady stream of bubbles from capillary tube.

8. When bubbles tops emerging and liquid begins to rush in capillary tube, note the temperature. This is of liquid.

9. Repeat the procedure twice and take observations.


F Y D Pharm & S Y D Pharm Notes, Books, Syllabus, PDF, Videos

First Year D PharmSecond Year D Pharm
ER20-11T Pharmaceutics TheoryER20-21T Pharmacology Theory
ER20-11P Pharmaceutics PracticalER20-21P Pharmacology Practical
ER20-12T Pharmaceutical Chemistry TheoryER20-22T Community Pharmacy & Management Theory
ER20-12P Pharmaceutical Chemistry PracticalER20-22P Community Pharmacy & Management Practical
ER20-13T Pharmacognosy TheoryER20-23T Biochemistry & Clinical Pathology Theory
ER20-13P Pharmacognosy PracticalER20-23P Biochemistry & Clinical Pathology Practical
ER20-14T Human Anatomy Physiology TheoryER20-24T Pharmacotherapeutics Theory
ER2014P Human Anatomy Physiology PracticalER20-24P Pharmacotherapeutics Practical
ER20-15T Social Pharmacy TheoryER20-25T Hospital & Clinical Pharmacy Theory
ER20-15P Social Pharmacy PracticalER20-25P Hospital & Clinical Pharmacy Practical
ER20-26T Pharmacy Law & Ethics

Suggested readings:

  • Preparation and standardization of Sulphuric acid standard solution
  • Determination of Melting point of organic compounds
  • BP208P Pharmaceutical Organic Chemistry I Practical
  • Qualitative analysis of carbohydrates: Glucose (Unknown Sample)
  • BP407P Physical Pharmaceutics II Practical

Recommended readings:

  • Pharmaceutics I Theory
  • b pharmacy syllabus

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