In this video the formation and the spectroscopical properties of copper (II) chloride are shown. Copper (II) chloride is synthesized from elements (i.e. copper metal and chlorine gas). Chlorine gas is produced by mixing bleach with vinegar. A copper wire in the form of a spiral is heated into the flame of a cooker and then introduced in chlorine atmosphere. Fumes of copper (II) chloride are immediately formed and then blown into the flame of the cooker in order to turn it bright green. Copper (II) chloride is also left of the surface of the copper wire so it will also turn the flame green when heated again.

Reaction between starch and iodine. A simple experiment you can do at home. Materials needed: - starch powder - you can buy this from the market - baked starch (in the form of a boiled potato) - iodine solution - you can buy this from a chemist's shop - distilled water - teaspoon - syringe WARNING The only hazard in this experiment is the iodine solution. You must not drink it or swallow it under any circumstances or let it enter your eyes.

With only household bleach, vinegar and a copper wire you can obtain the colours of aurora borealis in the flame of a gas cooker. Materials needed: - copper wire - sodium hypochlorite (household bleach) - acetic acid (9% vinegar) - medium-sized glass container - lid that covers the opening of the container How to work 1. Add about 50 ml vinegar into the glass container 2. Add about 30 ml bleach over the vinegar in the container. Quickly cover the container with the lid. (WARNING! Poisonous and corrosive chlorine gas is produced. Do not inhale the gas under any circumstances!) 3. Heat up the copper wire into the flame of the cooker. 4. Quickly introduce the incandescent tip of the copper wire into the chlorine atmosphere into the container. 5. Blow the copper (II) chloride fumes into the flame of the cooker (the flame turns green) 6. Heat up again the copper wire into the flame (the flame turns green again) 7. Repeat steps 3-6 WARNING! Work carefully with the flame of the cooker and with the heated metal in order not to burn yourself or anything around you.

Oxygen preparation and reactions - simple experiment which can be done at home Materials needed: - household bleach (sodium hypochlorite) - can be bought from the market - hydrogen peroxide- can be bought from a chemist''s shop - glass container (of about 300-400 mililiters) not too deep, not too wide and with an opening as small as possible - wooden grill spikes (alternatively wooden toothpicks) - gas lighter

Oxygen preparation and reactions - simple experiment which can be done at home Materials needed: - household bleach (sodium hypochlorite) - can be bought from the market - hydrogen peroxide- can be bought from a chemist''s shop - glass container (of about 300-400 mililiters) not too deep, not too wide and with an opening as small as possible - wooden grill spikes (alternatively wooden toothpicks) - gas lighter WARNING Do not swallow either sodium hypochlorite or hydrogen peroxide because they are both toxic and caustic.