Lifelong Learning Programme

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Experiences

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STUDENT EXPERIENCES

Title of the Experience
Extinguisher
Name of the student
C. Zaragozá
Country where it took place
Spain
School typology
Lower Secondary School
Thematic Area
Science
Experience typology
Laboratory
Type of Experience
Success
Description of the Experience
NEED :

Baking soda placed on a paper napkin
A perforated cork or plasticine
A drinking straw
A small water bottle (dry )
vinegar
A bit of sewing thread

INSTALLATION:

4 tablespoons of baking soda in the napkin, close and tie with string -shaped bag (it must be properly secured ) . Place 5 tablespoons of vinegar into the bottle. Put the baking bag inside the bottle deformed hang (with a portion of the wire out) and do not touch the vinegar. You take the cork or clay and place the straw in the mouth of the bottle.
Stir the bottle , covering the straw with your finger and holding the bottle while mixing baking and focuses the gas coming out of the bottle over a candle with vinegar ( without uncovering the straw ) . Remove your finger and focuses the gas coming out of the bottle over a candle .

EFFECT :

The reaction between bicarbonate (a base) and vinegar ( weak acid ) form carbon dioxide which fills the vessel and out through the straw. As it is heavier than air , facing the candle expels oxygen. Without oxygen the flame goes out ,

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