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.Safety
first
1.
Work microscale (small materials, small amount of substances).
2. Work in a tray, ALWAYS
use it. 3. ampoules
Label first fill later
4.
Syringes only from a pharmacy. 5. Even a candle
burner must be used inside a tray. 6. Bind long hairs together.
7. Extinguish burners immediately after use. 8. Wear googles for
chemical experiments. 9. Carefully
wash your hands after experimentation. 10. Do not
eat during experimentation.
Ecoteens = Students
of 13 learn chemistry by microscale experimentation
wat01:
water and CO2 from a burner
wat02:
reduction of water by Ca
wat03:
reduction of water by CaC2
wat04:
redox reaction of water in a pipette
wat05
Acid Rain due to the combustion of sulfur or its compounds
wat06:
Hydrochloric acid from "hydrochloric acid gas" and water
wat07:
Hydrogen chloride gas absorbed by water generating a fountain
wat08:
Universal indicator inicates HOW acidic a liquid is
wat09:
Ammonia gas forms an alkaline solution
wat10:
Ammonia gas absorbed by generating a fountain
wat11:
Sodium hydroxide solution the most common alkaline solution
was12:
Universal indicator and red grape juice indicate HOW alkaline ... is
was13:
Measurement of pH in coloured and turbid liquids
wat14:
Neutralisation: Lime water and very little vinegar leave a neutral solution
wat15:
Acid base reaction during mixing of sulfuric acid and water
wat16:
Sulfuric acid produces carbon and water vapour from sugar
wat17:
Measuring the O2 concentration of water ("Mini-Winkler")
wat18
Measuring the O2 consumption during cleaning of waste water
back.......
go
on...........first
published: 16.10.2001................last
modification: 03.02.2011
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