Lets see how we can make a magnifying glass in case of an emergency
Materials Required
- A magazine page with small print
- A clean empty olive bottle
- Water
Instruction
Fill the olive jar with water to the brim. Screw on the cap. Make sure the lid is tight.
Now hold the water filled olive jar above the small printed text.
The text is now enlarged and inverted.
The water filled olive jar acts like a LENS!
Cleansing Action of soap.
Most of the dirt is oily in nature. We know that oil does not dissolve in water, so how do we get rid of the dirt? The answer to our problems is soap! Soap are long carboxylic chain of sodium and potassium salts. The soap molecule consists of two ends - the hydrophobic “tail” and the hydrophilic end (See figure 1). The hydrophobic tail dissolves in oil while the hydrophilic end dissolves in water. Hence one end in the soap molecule faces towards the water, while the other end face towards oil. This forms an emulsion in water. This structure is called micelles(See figure 2). Soap in the form of micelles is able to clean dirt.
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| SOAP MOLECULE (FIG 1) |
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| MICELLES (FIG 2) |
The hydrophobic end is always kept away from water. Inside water the soap molecules form clusters, in which the hydrophobic end is in the interior.
Why does the soap solution appears to be cloudy?
The micelles are large enough to scatter light, hence soap solution appears to be cloudy
