Molecular Model for C6H12O6

Class 2- 8/26/13

During class on 8/26/13, we refreshed our memories on basic chemistry. We were given a choice to pick which worksheet we wanted to work on, and I choose the one about making molecular models. Our objective was to practice reading formulas, counting atoms, visualizing atomic bonding, representing bonding using dot diagrams, and predicting and clarifying bonds as either ionic or covalent. On the worksheet we were given formulas and we had to count the atoms, draw the model and dot structure, and say if it was polar or non polar. This activity was informative and fun. This exercise was to prepare us for an oral quiz on basic chemistry that we had next. 

Video of oil and coffee

This is the video of our experiment using oil and coffee. 

Video of vinegar and skim milk

This is the video of our experiment using vinegar and skim milk. 

Video for orange juice and 2 % milk

This video is of our experiment using orange juice and 2 % milk.

Dancing Milk Experiment

During class on 8/22/13, we created experiments based off of the famous “Dancing Milk Experiment”. The “Dancing Milk Experiment” is when you have whole milk in a shallow dish. Then you place drops of color dye in the milk. Then place drops of dish soap and watch the reaction. The reaction looks like the color dye is swirling around in the milk.  The reason behind the reaction is because of the soap and the fat of the milk.  The soap’s polar, or hydrophilic (water loving), end dissolved in the water in the milk, while the non-polar, or hydrophobic (water fearing), end attached to the fat of the milk. The fat molecules bend and move in different directions while the soap molecules try to match up with them. The coloring dye’s molecules are being moved around, so that looks like the color is swirling. The soap in this experiment is a surfactant because it reduces the surface tension of the milk. To further our knowledge, we explored new experiments. My group performed three different experiments: one using 2% milk and orange juice, one with vinegar and skim milk, and one with coffee and oil. We performed the orange juice and 2% milk three times, the vinegar and skim milk twice, and the coffee and oil once. We tried multiple times to see if there was any variation even though the substances were the same. The constant variables in our experiments were the quantities of the liquid, dye, and soap and we used the same dye and soap for each experiment. However, the experiment with coffee and oil was executed with a different brand of soap for variation. Since there was fat in the 2 % milk, skim milk, and orange juice, there was a similar reaction to the reaction from the “Dancing Milk Experiment”. The vinegar, coffee, and oil all had same reaction because there was no fat content in them. Our experiments confirmed the reasoning from the “Dancing Milk Experiment” because the reaction came from the polarity of the soap and the fat.