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!!!
Well today we did have a very interesting experiment, some might think
that this experiment is dull and way too simple, but when you really try
it out, you will eventually realise that there is a lot of things to
learn in science especially the fun way
The person in-charged for today's meeting was no other than Ong Meng Teck
So our aim today was to make sure that the thread goes through the ice slightly so that we can lift it
In order to achieve it, we use either Pressure concept or Reducing Melting point concept
For the pressure concept, we used 2 pendulum bob and tie them together
with a thread. Then this thread is rest upon the ice thus providing the
pressure needed.
As for the the Reducing Melting point, we used salt which in this case
we used Potassium Chloride. By placing the thread on the ice and then
pouring some salt on the thread, the salt will cause a reduction in
melting point of ice thus the thread will go through the ice easily.
When the water on the ice dilutes, the melting point is then restored to
it's original value thus freezing back slightly.
Enough of points, now picture time
Meng Teck explaining the procedure
Ice placed on Petri Dish
A great way to apply pressure
Our teacher advisor explaining the theory
There will be more experiments to come in the future!
Well we have long awaited for this experiment to clearly see the result of the smoke bomb experiment
So what we need? 1) Potassium Nitrate
2) Sugar
All we need to do is heat it up together in a ratio of 1:1 and once it turn caramel brown and melt, turn off the bunsen burner and stir it. Then put it onto an aluminium foil and let it cool down.
Upon doing that, we bring it to our school field and burn it. The result was awesome.
Unfortunately due to some circumstances, we do not have any media to upload for you to view. Our sincere apologies.
