Tuesday, May 15, 2012


16 May 2012


Read the introduction, objectives and theoretical background to the project and then answer the following questions:
  • What main theory or concept is the project based on?
Caffeine Extraction: In the technique of solvent extraction, the theory is that organic compounds would more likely be soluble in organic solvents, while polar materials would more likely be soluble in polar solvents. Another concept would be the density of different materials, for example, the water, which was less dense than the mixture of caffeine and dichloromethane, was on a layer totally separate and on top of the mixture of caffeine and dichloromethane.
Fastest Ball: The theory involved in this challenge is physics’ law of conservation of energy, which is the theory that energy is converted from one from to another (i.e the ball takes converts gravitational potential energy into kinetic energy as it rolls down the ramp). 
  • What do you already know about this theory or concept?
Caffeine Extraction: We know that should a liquid be less dense than another liquid, it would float above the denser liquid, which is basically the concept of density.
Fastest Ball: We have already learnt about the law of conservation during physics, and know the general rules behind it.

Caffeine extraction done by: Nathaniel and Isaac
Fastest Ball done by: Yong Hong

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