Chem blog week 3

This week we introduced density and reviewed volume and density by doing and experiment with different liquids. What happened was that each group got a different type of liquid. The choices varied from water, oil, fruit drinks and a few carbonated drinks which included them being diet and original. In my group we measured the Diet Coke. We first found the mass of the drink which involved a lot of patience due to the bubbles deceiving the eyes until it fizzled down. We did this five times with five different levels on the graduated cylinder which measured from 10mL to 50mL. When we finished calculating our data we were then notified that everyone else had subtracted the mass of the cylinder so we had to edit our results before we submitted them on Lino. (Which that day I found out was pronounced LY-NO). We then discussed the experiment and we came to the conclusion that density equals mass divided by the volume. Along with the formula came two tricks to remember them: "hearts and arrows"and "mountains over valleys". I can just see people making the shapes with their arms during midterms. We then listed all of the liquids in order of density from least to greatest. Contrary to my hypothesis, oil ended up being the least dense liquid even though oil seems so thick. Also water came second to last which was also against what I planned. I tried to understand why it worked out the way it did but all of my solutions had flaws. That will be something that I will have to find out next week. In our experiment we also showed particle diagrams of what we thought the liquids particles would be formed close up. I pictures depicted that with less density there would be less particles and with more density, more particles. Mr. Abud then showed us how our information could be applied worth vegetable oil and water. Of course everyone said the oil would float because it was light but Mr. Abud also acknowledged that the water was denser than the oil. While I knew the oil would float based on past experiences I never really thought about why it actually happened. Also this week we had our first chemistry assessment. While a lot of people were kind of stressed out about it and trying to cram I was pretty calm due to the fact that in physics last year we also had assessments and if you don't do as awesome as you would have liked to or now understand an aspect of the unit we have reassessments. When I took the assessment I was very confident on some things and a few things I had no idea how to solve them. But thankfully I got through it finding almost everything out I was struggling on. This week I was able to catch up on everything easily and the things that we learned about volume and mass totally correspond with what we are learning about density. Everything is going great in chemistry and each week I get more and more excited about the following week.