Source: Science Class with Teacher Wa
M1/2 on making a mixture with water and oil. For this experiment, here are the questions that the group needs to answer: How to mix the water and oil together when the oil will just float on the water? What makes the water separated from the oil? These were the questions that ignite the interests of the M1/2 Science class.
While doing the laboratory, students showed eagerness to know the answers of their questions ans were happy to do the experiment. They performed well and enjoyed the activity. In fact they were able to understand why the water and the oil cannot be combined at all without the help of this so called emulsifier.
In the experiment, they used two types of emulsifiers-yellow mustard and the polysorbate-20. They had been stirring so hard mixing the water and the oil at first without the emulsifier but no matter how much effort they put, it ends up imperfectly combined. Then, they tried the first emulsifier which is the yellow mustard. The result was appreciated but not satisfactory. The mixture was not totally mixed. Finally, the polysorbate-20 was used to see whether it can completely combine the water and the oil. The students were amazed with the result because they had got the answers of their inquisitive questions.
This experiment was conducted not only to achieve the objective which is to mix the water and the oil completely using the emulsifier but to enhance the skills of the students using the scientific knowledge of investigations. Thus, this scientific knowledge they gain might help them in creating something for the purpose of a real life situation.