Its a simple experiment done on 9/8/2012. This will be the last meeting of the year. Since its a fire water balloon activity, we have: Balloon Candle
Start it by filling the balloon with water. Almost half is enough. Light up the candle and start burning the balloon. You will be surprise that it will not burst!!
see this
Water have high specific heat capacity that can prevent the balloon from bursting. But continuously heating will also burst the balloon as the water temperature increases.
Carbon is formed at the bottom of the balloon where the part that it is heated.
This is the first experiment carry out with the new peoples. We have done two experiments on 2/8/2012.
First experiment
Apparatus and materials: Sodium hydroxide, NaOH
Sugar
Water
Weak solution of potassium permanganate
Sodium hydroxide is mixed with sugar in water . Add weak solution of potassium permanganate to the mixture. Observe the colour change~! It will change from purple to green then to yellow.
Explanation: Manganese in KMnO4 is in oxidation state +7. In a solution of NaOH and sugar, Manganese is reduced to its +6 (green) and +4 (yellow) oxidation states.
Here is a video of the experiment
Second experiment
Apparatus and materials: Plastic bottle
Alcohol
Lighter
Procedure:
Firstly, the plastic bottle is rinsed with a little of alcohol. Make sure all the sides of the bottle is covered by alcohol. The, the alcohol is poured out. CAUTIONS: the alcohol must be removed from the bottle to prevent fire that cannot put out!!! Later, the bottle is squeezed around 20 times so that the air can enter the bottle. Bring the lighter to the top of bottle and see what happens!!!
