Submitted by Editor
Aim:
To compare the foaming capacities of five different commercial soaps.
Apparatus:
5 test tubes, 5 conical flasks (100 ml), test tube stand, Bunsen burner and stop watch.
Chemicals Required:
5 different samples of soap and distilled water.
Theory:
For iCBSE | |
Procedure: | |
Five conical flasks (100 ml each) are taken and numbered 1 to 5. | |
In each of these flasks equal amounts (say 5 gm) of the given samples of soap | |
shavings or granules are taken and 50 ml of distilled water is added. | |
Each conical flask is heated few minutes to dissolve all the soap completely. | |
In a test-tube stand, five big clean and dry test tubes are taken and numbered 1 to | |
5. | |
One ml of the five soap solution is then poured in the test tubes of corresponding | |
number. | |
10 ml. of distilled water is then added to each test tube. | |
Test tube no 1 is then shaken vigorously 5 times. | |
The foam would be formed in the empty space above the container. | |
Stop watch is started immediately and the time taken for the disappearance of | |
foam is noted. | |
Similarly the other test tubes are shaken vigorously for equal number of times (i.e., | |
5 times) with approximately with the same force and the time taken for the | |
disappearance of foam in each case is recorded. | |
• | The lesser the time taken for the disappearance of foam, the lower is the foaming |
capacity. | |
Tabulations of the result are given below: |
Observation:
Amount of each soap sample taken = 5 gm Amount of distilled water taken = 50 ml. Volume of each soap solution taken = 1 ml. Volume of distilled water added = 10 ml.
S. No. | Name of the Soap | Soap Sample Time taken for the disappearance of form (in secs) |
Result: #0^^
The foaming capacities and hence the washing action of different soap samples are in the order :
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