AIM :
To determine the percentage of alcohol soluble & insoluble in washing soap.
SOAP USED :
Here the soap used for analysis was sunlight bar soap.
APPARATUS:
- 250ml beaker
- Electronic balance
- Glass rod
- Water bath
- Funnel
- Air oven
- 100ml conical flask
REQUIREMENTS:
- 2.5gm sliced sunlight bar soap
- 100cc 95% alcohol
- Filter paper
PROCEDURE:
- Given sunlight bar soap is made to small slices.
- Weigh accurately 2.5gm of the sliced soap sample using an electronic balance.
- Note the weight taken.
- Put the weighed soap sample to a 250ml beaker.
- Add 100cc 95 % alcohol.
- Heat the beaker with the contents on a water bath.
- St
Ir the contents in the beaker with a glass rod until the soap is dissolved.
- Wash a 100ml conical flask
- Dry it in an air oven,cool for a while & take the weight.
- Note this weight.
- Take a filter paper & note the weight
- Filter the contents in the beaker through a funnel provided with the weighed filter paper to the previously weighed 100ml conical flask.
- Washing is done twice with the alcohol & remove all the contents to the
conical flask.
- Distill off alcohol from the conical flask by placing it on a water bath.
- Then dry the conical flask with the contents in a hot air oven, cool for a while & take the final weight.
- CALCULATION: We have the weight of soap taken, weight of conical flask alone & the weight of conical flask with the contents.From this the percentage of alcohol soluble substance can be calculated. I was able to calculate the % of alcohol soluble substance in sunlight soap as 68.89
- Don't dry the filter paper in oven.Keep it outside itself.When it is dried completely take the final weight of filter paper & its contents
- CALCULATION: Weight of soap taken, weight of filter paper alone & the weight of filter paper with its contents are already noted. From this the % of alcohol insoluble substance is calculated. The % of alcohol insoluble substance in sunlight soap was calculated to be 15.44%
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