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Aim: To determine the alcohol content of asava and arista.
Requirements:
- Digital weighing balance
- Beaker
- Measuring Cylinder
- Distillation flask
- Separating funnel
- Heating metal
- Water bath
- Specific gravity bottle
- Water
Procedure: Measure 25 ml of formulation by measuring cylinder and transfer to distillation flak having capacity of 500 ml. Wash the measuring cylinder with 150 ml of water and add it to the flask. Add some porcelain pieces to the flask and distilled them. Collect about 90 ml of distillate from this take 25 ml of distillate and dilute it to 100 ml with water and with the help of a specific gravity bottle determine the specific gravity of liquid at 25°C. Follow the alcohol content table with specific gravity and determine the V/V alcohol content in the sample.
Calculate the % alcohol content by using the multiplication factor.
Determine the Specific Gravity: A tube of known weight (W) was filled first with essential oil and then with water and the respective weight w1 and w2 was determined. Then, the specific gravity was calculated using the following formula:
d = (w1-w)/(w2-w)
Relative Density with Percent Ethanol Content:
| Relative density at 25oC | Percent ethanol content w/w at 15.56°C | Per cent ethanol content v/v at 15.56°C |
|---|---|---|
| 0.8158 | 90 | 93.3 |
| 0.8146 | 90.5 | 93.6 |
| 0.8131 | 91 | 94 |
| 0.8118 | 91.5 | 94.3 |
| 0.8104 | 92 | 94.7 |
| 0.8090 | 92.5 | 95 |
| 0.8076 | 93 | 95.4 |
| 0.8062 | 93.5 | 95.8 |
| 0.8048 | 94 | 96.1 |
| 0.8034 | 94.5 | 96.5 |
| 0.8020 | 95 | 96.8 |
| 0.8006 | 95.5 | 97.1 |
| 0.7992 | 96 | 97.5 |
| 0.7977 | 96.5 | 97.8 |
| 0.7962 | 97 | 98.1 |
| 0.7957 | 97.5 | 98.4 |
| 0.7932 | 98 | 98.8 |
| 0.7917 | 98.5 | 99.1 |
| 0.7902 | 99 | 99.4 |
| 0.7886 | 99.5 | 99.7 |
| 0.7871 | 100 | 100 |
Report: Alcohol content of Asava and Arista was found to be __________________.