Looking Back: What Happened? This lab is probably the best lab Savreen and I have done so far, the bath bomb we made turned out great. When it was put into a bowl of water it started fizzing instantly causing the ingredients in the bath bomb to distribute nicely. We used blue and pink as our main colors, so it ended up changing the water to a nice purple color, the peppermint extract also made everything smell really nice afterwards. Looking Beyond: What's the Science? Bath bombs are mainly showing how bases react to acids, when making bath bombs the baking soda is the base, and the citric acid is the acid. These reactions can be altered by other materials that are in the bath bomb, like cornstarch and Epsom salt are the liquid absorbers. They make sure that the citric acid and baking soda don’t react when the liquids needed to make the bath bombs are added. So when you add large amounts of water to the bath bombs they fizz because it makes carbon dioxide bubbles, ACID + ALKALI = WATER = CARBON DIOXIDE (FIZZ) Alkali definition: a soluble salt obtained from the ashes of plants and consisting largely of potassium or sodium carbonate; broadly : a substance (as a hydroxide or carbonate of an alkali metal) having marked basic properties http://www.merriam-webster.com/dictionary/alkali Looking Inward: Did you get desirable results? This has probably been Savreen and I's most successful lab we've done so far, we didn't struggle very much. Before we started the lab we made sure we did a lot of research on the chemical reactions, so we knew what was happening. Actually making the bath bomb was very fun, easy, and it went almost exactly how we wanted it. The one thing that didn't work out was when we left the bath bomb out to dry it expanded into one big bath bomb. I think I performed well in this lab, all but one of the ingredients that were needed I had from when I made bath bombs last year, so it was nice to not have to worry about getting materials. Last year when I made bath bombs I knew I added too much oil, and food coloring so I made sure not to do that this time. Looking Outward: Collaboration and Impact I worked with Savreen on this lab, and I think we worked really well together. We distributed the work evenly so we both knew exactly what we had to do and when we had to have it done. I specifically contributed by doing the proposal along with Savreen, I also looked into a lot of the science behind what we were doing so I knew what was happening specifically. I also brought a lot of the materials I had left over from last year, which was everything but citric acid. Looking Forward: What's Next? If I could do this project again I would try to make more than one bath bomb, and make sure it dries in a circular shape, by keeping it in a smaller container. I've worked with Savreen on every lab so far, and we've always done whatever we could to make sure we were really successful. I don't think there's anyway we can continue this lab, we could continue on with the beauty-ish type of projects, but I don't think we can continue on with specifically bath bombs. Take Away: Summary We started off this project by mixing all four of the dry ingredients in a bowl first, then in a separate container we mixed all of the wet ingredients. Then with a dropper tool we put around three drops of the wet ingredients into the bowl with dry ingredients, we had to do this in small amounts because if we added to much liquid it would make everything fizz up. We alternated dropping, and mixing multiple times until the mixture was able to hold a shape, then we separated it into two bowls. We colored on bowl with the bath bomb mixture blue, and the other pink, we then put the mixture in our mold which was two Starbucks lids. After it was molded, we tried to put some sprinkles in at the top which didn't really work. Once the bath bomb had sat overnight drying we put it in a bowl of water, it fizzed and spread very well.
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December 2015
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