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A reaction between the lime and citric acid in the soil

Needed : a glass with the opaque background because of the limestone encrusted lemon contains citric acid.

procedure : it takes the glass, tips and press a bit on the bottom 'of lemon juice. He expects about ten minutes and you see the formation of a slight effervescence, in the end the limestone disappears and the glass is more transparent.

Explanation : the limestone is not more because the citric acid content in lemon juice reacted it producing carbon dioxide, the gas has resulted in the formation of small bubbles.

The same reaction occurs when using scaling sold on the market, which also contain the strongest acid citric acid to make the shiny steel of the taps, or the pots of porcelain Toilet.

photos experiment

FIRST


After

Text and photos by Vincent Dello Stritto

Dishlex Global 300 Stops At Prewash

Air

This experiment aims to demonstrate that even in the ground there air.

Required materials: A glass containing enough dry land and not clay and water

Procedure: Take the glass in the ground.









Pour in a bit 'of water very slowly

After some seconds you will see the "foam" or white bubbles: this is evidence that there is air in the soil.

Text and photos by Renato Taccogna

Community Service Thank You Letters

thermal expansion of the gas density

Material Needed

A bottle, a balloon and any source of heat.



Procedure 1) Place the balloon on the bottle so that air does not pass.

2) Take the hair dryer (or any source of heat) and heat the bottle.



Conclusion The volume of air varies depending on temperature:

if the bottle cools down the volume air decreases.

If the bottle is heated the volume increases, and then the balloon is inflated

Text and photos by Renato Taccogna