IB Chemistry HL IA 7점

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본 문서는 2019년에 작성한 Chemistry IA입니다.
플라스틱의 유해성분 Bisphenol A가 우리 몸에서 어떤 작용을 하는지 화학적인 관점에서 접근하여 탐구한 실험입니다.
Back titration 방법을 사용하여 직접 실험하였고, acid-base calculation이 쓰였습니다.
화학 개념을 실생활과 어떻게 연관해야 할지 감이 오지 않으신 분들!!!!
제가 주제를 정하고 결과 도출까지 어떤 process로 하였는지 참고하시면 분명 도움될 겁니다.
파이널 7점 받았습니다 🙂

 

[본문내용]

Modeling of How Much Sodium Hydroxide (NaOH) Required for Hydrolysis Degradation of Bisphenol A (BPA) Leaching Out from Plastic Goods in Human Body

 

1. Research Question

To what extent does the increasing concentration of Bisphenol A (BPA) from 0.01M to 0.05M at 0.01 intervals affect the concentration of sodium hydroxide (NaOH) needed to neutralize during the back titration?

 

2. Background Information

Bisphenol A, C15H16O2, is a ubiquitous raw material employed in polycarbonate and resin industries to make certain plastic products. Despite its usefulness, many people are likely to seek for BPA-free products as long-term exposure to bisphenol A (BPA) can have serious consequences to human health such as being a potential endocrine disruptor (Rubin, 2011). The intake of BPA is indirect – that is to say, BPA susceptible to high temperature (100°C or above) may leach into hot foods or drinks that people normally consume from plastic goods. One study suggested BPA migration will be increased up to 55% in boiling water (Le, 2008). From here, I developed my investigation to figure out how much BPA would leach out from different types of commercial plastic goods in boiling water and then to examine whether further use of them is acceptable or not. As a pilot experiment, plastic water bottles, plastic wrap, plastic bag, plastic dish, and plastic cutlery were all put into boiling water and conducted ferric chloride test to inspect the presence of phenols by color change. Intriguingly, any of samples for three trials did not express any changes at all, coming into a conclusion that BPA input to create plastic goods may be inconsiderable in nowadays. With this finding, I went for another perspective of any chemical reaction involving BPA that have already accumulated in our human body and found out hydrolysis degradation of BPA with sodium hydroxide (NaOH). We often ingest sodium hydroxide through food additives or in the form of ‘lye water’ that is very diluted. Specifically, the intake of chocolates, pretzels, ramen noodles can increase the consumption of NaOH. In order to produce traditional ramen noodles, the NaOH is a key ingredient that increases pH of the dough (Chakravarty, 2016)…

 

  • 총 페이지수: 13 pages
  • 과목명: Chemistry
  • 주제: Modeling of How Much Sodium Hydroxide (NaOH) Required for Hydrolysis Degradation of Bisphenol A (BPA) Leaching Out from Plastic Goods in Human Body
  • The file is in PDF format.
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IB Chemistry HL IA 7점

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