Sunday, January 24, 2010

Determination Of The Percentage Of Alcohol Soluble & Insoluble In Washing Soap




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.
  • StIr 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%

Tuesday, January 19, 2010

Determination of Total Fatty Matter (TFM) of Bathing Soap



AIM :

To determine the TFM of bathing soap. Here i used the Medimix soap.

PRINCIPLE:

TFM is determined by titrating fatty acids by means of HCl & extracting oil & acid with ether.

APPARATUS:

  • 2 separating funnels

  • 250ml beaker :1

  • 100ml conical flask :1

  • Electronic balance
  • Air oven

REQUIREMENTS:

  • Hot water
  • 1:1 HCl

  • ether

  • soap sample

PROCEDURE:

  • The bathing soap is made into small slices.
    Weigh 5gm of thoroughly mixed soap sample using an electronic balance.


  • Note the weight taken.


  • Add the weighed soap sample into a separating funnel.







  • Add 30ml hot water from a beaker & mix well.

  • Excess 1:1 HCl is added to decompose the soap, till acids float as a clear layer on the top, cool & add 50ml ether, mix well & separate.

  • The aqueous layer is taken in another separating funnel & extract with ether.

  • The combined ether extract were washed thrice with water to remove mineral acids & the contents were collected in a previously weighed 100ml conical flask.

Distill off ether from the conical flask & dry the conical flask ( with the contents) in a hot air oven to constant weight.

CALCULATION:

From the weight of soap taken, weight of conical flask alone & the weight of conical flask with the contents, the total fatty matter can be calculated. I was able to calculate the TFM of MEDIMIX soap as 57.98





Monday, January 18, 2010

Moisture Content Of Bathing Soap



AIM:
To determine the moisture content of bathing soap.
Here i used the Medimix Soap.
APPARATUS, REQUIREMENTS & PROCEDURE are the same as that of determination of moisture content of washing soap.
RESULT:
The % of moisture content in medimix soap was calculated to be 16.185

Tuesday, January 12, 2010

Total Fatty Matter Of Washing Soap

AIM:
To determine the Total Fatty Matter (TFM) of Washing Soap

PRINCIPLE:
TFM is determined by titrating fatty acids by means of HCl  &; extracting oil & acid with ether.

APPARATUS:
  • 2 separating funnels
  • 250ml beakers: 2
  • 100ml conical flask : 1
  • Electronic balance.
.
REQUIREMENTS:
  • Soap sample
  • Hot water
  • 1:1 HCl
  • Ether
PROCEDURE:
  • The washing bar soap is made into small slices.( fig: already shown in the previous post)
  • weigh 5gm of thoroughly mixed soap sample.

  • Note the weight taken & add the soap sample into a separating funnel.

  • From a beaker add 30ml hot water & mix well.

  • Excess 1:1 HCl is added  to decompose the soap, till acids float as a clear layer on the top, cool & add 50ml ether,mix well & separate.
  • The aqueous layer is taken in another separating funnel & extract with ether.
  • The combined ether extract were washed  thrice with water to remove mineral acids.
  • The contents are taken in a previously weighed 100ml conical flask.

  • Ether distilled off & dried to constant weight.
CALCULATION
From the weight of soap taken, weight of conical flask+ sample & the weight of conical flask alone, the Total Fatty Matter of Washing Soap can be calculated.

I was able to calculate the TFM of sunlight bar soap as 55.096.





Tuesday, January 5, 2010

Moisture Content Of Washing Soap



Here the soap used was Sunlight Bar Soap

AIM:
To determine the moisture content of sunlight bar soap.
APPARATUS:
China dish, Electronic balance.,Oven


REQUIREMENTS:
Sliced sample of sunlight bar soap



PROCEDURE:
  • Wash the china dish.
  • Dry the china dish in an air oven, cool .
  • About 5gm of sliced soap sample is taken.
  • Note the weight.
  • This is added to the previously dried china dish.
  • Note the weight.
  • China dish with the sliced soap sample is dried in a hot air oven at 50- 60 degree for 1 hour.
  • Cool  & take the weight.
  • From the loss of weight, the moisture content of washing soap can be calculated.
RESULT:
I was able to calculate the % of moisture in sunlight bar soap as 24.16
I hope this is an interesting simple experiment for everyone.