Chemistry HL IA – 7점

안녕하세요. 본 문서는 2019년 May Session에서 7점을 받은 Chemistry HL IA 입니다. 많은 학생이 화학 IA 주제를 찾는 것에 어려움을 느끼는데, IA는 EE와 달리 평범한 주제를 가지고 세세한 디테일에 신경을 쓰면 고득점이 가능한 바입니다. 이 IA는 “Investigating the effect of temperature on rates of the two reactions steps of the chemical chameleon” 라는 주제로, reaction rate 이란 평범한 주제로 고득점을 할 방안을 제시하는 exemplar입니다.

[본문내용]

Investigating the effect of temperature on rates of the two reactions steps of the chemical chameleon

Introduction

The redox reaction between glucose and potassium permanganate is often used to demonstrate the beauty of chemical reactions. Deserving of its title as the “chemical chameleon,” the reaction displays a wide array of colors during its progression, ranging from purple, blue, green to orange, along with a multitude of shades in between.

During the chemical chameleon reaction, the permanganate ion is reduced to the manganate ion, where glucose acts as the reducing agent. Then the manganate ion undergoes a disproportionation reaction with water to yield manganese (IV) oxide (Hutchins). Disproportionation is when a molecule undergoes simultaneous oxidation and reduction to yield at least two different products (Helmenstine). The oxidation state of manganese changes throughout the reaction, from purple +7 to green +5 and finally to a brown solid +4. As there is less research on the overall reaction stoichiometry and the oxidation of glucose, only the half equations of manganese are listed below (Flisek). I found these equations sufficient, provided I make a few assumptions, for the calculations and analysis in my investigation…

• 총 페이지수: 12 pages
• 과목명: Chemistry
• 주제: Investigating the effect of temperature on rates of the two reactions steps of the chemical chameleon
• The file is in Word format.