A small piece of malachite is decomposed by hydrochloric acid. A green solution of copper chloride and a gas is left that makes lime water turbid.
URL in English:
www.micrecol.de/s alzE9.html
URL in German:
www.micrecol.de/s alz9.html
In well 1 and well of a wellplate6 two copper(II) chloride solutions were electrolyzed between pencil lead electrodes. The result is a copper chlorine battery that powers an electrolysis of an iodide solution and a drop of phenolphtalein indicator in well 3.
Red colour around the negative electrode indicates OH- ions, yellow colour around the positive electrode proves that iodine was formed.
Micro burner with solid, liquid and gaseous fuels are demonstrated:
A candle (Kerze), an ampoule micro spirit burner (Spiritusbrenner in einer Ampulle) and a micro butan gas burner. are demonstrated
Not only doctors use syringes.
Nine children of a kindergarten are fishing mosquito larvae ("fishes") with a syringe to transfer them to an ampoule.
They learn:
1. Handling of a syringe
2. Development of a mosquito.
Two ampoules (models of divers) are supplied with weight belts (lead pieces of a curtain seam) and transferred in a bottle with Dead Sea water and red sea water.
In this experiment Professor Najdoski dissolves 6 g of sodium acetate in 1 mL of water by heating.
The solution is transfered into a 3-mL barrel pipette. Its thin stem is closed by welding.
URL (english): www.micrecol.de/najd osKristE.html
URL (german): www.micrecol.de/najd osKristD.html
White, red, black, blue and green beads are connected by tiny pieces of chewed chewing gum to compose molecule models of the elements H, O, C, N, Cl and their compounds. These models can be quickly composed ("synthesis") and decomposed ("analysis").
Auf ein Stückchen Cu-Blech (+ Pol) kommt ein mit CuSO4-Lösung getränktes Filterpapier und anschließend eine kleine Scheibe gereinigten Lithiums (- Pol). Darauf wird ein Graphitstab gedrückt.
Der gelieferte Strom treibt einen Elektromotor an. Eine Spannung von 2,7 V und ein Strom von 14,6 mA werden angezeigt
At a voltage of 8 V AC two pins (constant distance) are dipped into 6 water samples:
1. Dist. water, 2. fresh water, 3. mineral water, 4. Cola, 5. Cola light, 6. Cola light + a drop of Glauber salt solution.
A digital multimeter shows increasing current.
URL: www.micrecol.de/(1wu erz16E.html www.micrecol.de/(1wu erz16.html
Eine Plastikpipette füllt man mit Glaubersalzlösung und klemmt sie zwischen Kammer 1 und 6 der Reaktionsplatte WP6 ein. In die Kammer mit der Pipettenöffnung kommt Seifenlösung. In den Pipettenkopf sticht man 2 Stecknadeln, die mit einer 9-Volt-Batterie verbunden sind.
Auf der Seifenlösung sammelen sich Knallgas-Blasen an. Diese lassen sich in Minutenabständen entzünden
Small quantities of dried leaves of red cabbage, blue Petunias and blue bellflowers are added to 5 mL of water and heated on a candle heater.
Drops of the extracts are transfered to a white plastic surface.
Drops of lime water and of lemon juice are added.
An electric circuit is assembled by connecting a 9-Volt battery, one pin and the short lead of a light emitting diode (LED). The circuit is closed by dipping the pin and the long lead of the LED into 4 solutions:
1. sugar, 2. salt, 3. citric acid, Dead Sea salt.
URL: http://www.micrecol. de/sss2.html
Drei digitale Taschenwaagen und eine Balkenwaage werden mit Hilfe von Gewichten aus kariertem Papier getestet.
Three digital pocket scales and a two pan scale are tested using weights made from square paper.
120 mg Calcium (mit 2 Hämmern geschmiedet) und ein 3 x 3 cm großes Stück Magnesium-Band reagieren in umgedrehten 12-mL und 2 mL_Behältern mit Wasser. Diesem wurde Phenolphthalein-Lösu ng zugesetzt.
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