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School science experiments (view source)
Revision as of 13:29, 22 August 2014
, 13:29, 22 August 2014no edit summary
=Soap hating and sugar loving match sticks=
=Soap hating and sugar loving match sticks=
<br>'''Materials'''<br>
<br>'''Materials'''<br>
A bowl with water, match sticks, sugarlump, soap piece.<br>
<br>'''Procedure'''<br>
<br>'''Procedure'''<br>
Arrange the match sticks (about 6 of them)in the bowl of water leavinf space between the ends about the size of a rupee coin.<br>
Place a small piece of soap with a stick at the center. The match sticks run away to the sides of the bowl showing they hate the soap.<br>
Remove the soap piece and place a lump of sugar at the center of the bowl. All the match sticks will come to the center showing they love sugar.<br>
<br>'''Discussion'''<br>
<br>'''Discussion'''<br>
Soap contains long chain sodium salt fatty acids which are hydrophobic and repelled by water molecules.So the sticks go away to the sides.When sugar is placed in the bowl the water molecules dissolve the sugar particles and their attraction causes the match stiks to come close to one another.
<br>'''Shared by/ Source'''<br>
<br>'''Shared by/ Source'''<br>
Praveen Kamath Sir, GHS Ankanahally, Somavarpet Taluk, Kodagu
Praveen Kamath Sir, GHS Ankanahally, Somavarpet Taluk, Kodagu