레포트 clock reaction 화학실험 레포트

레포트 clock reaction 화학실험 레포트

[레포트] clock reaction 화학실험 레포트.hwp

본문 Result (Analyzed Data) Reaction Mixture Spend Time until change of color (s) I- S2O82- Relative rate of reaction 1 70 0.08 M 0.04 M 1.43 2 140 0.04 M 0.04 M 0.71 3 116 0.08 M 0.02 M 0.86 Reaction Reaction flask(100mL) Reaction flask(50mL) 1 10.0 ml 0.200M KI 10.0 ml 0.100M (NH4)2S2O8 2 5.0 ml 0.200M KI 5.0 ml 0.200M KCl 10.0 ml 0.100M (NH4)2S2O8 3 10.0 ml 0.200M KI 5.0 ml 0.100M (NH4)2S2O8 5.0 ml 0.100M (NH4)2SO4 ※ Calculation of I- Reaction 1 10.0 ml × 0.200 M = 25.0 ml × n1 M n1 = ( 10.0 ml × 0.200 M ) / 25.0 ml = 0.08 M Reaction 2 5.0 ml × 0.200 M = 25.0 ml × n2 M n2 = ( 5.0 ml × 0.200 M ) / 25.0 ml = 0.04 M Reaction 3 10.0 ml × 0.200 M = 25.0 ml × n1 M n1 = ( 10.0 ml × 0.200 M ) / 25.0 ml = 0.08 M ※ Calculation of S2O82- Reaction 1 10.0 ml : 0.100 M = 25.0 ml : n'1 M n'1 = ( 10.0 ml × 0.100 M ) / 25.0 ml = 0.04 M Reaction 2 10.0 ml : 0.100 M = 25.0 ml : n'2 M n'2 = ( 10.0 ml × 0.100 M ) / 25.0 ml = 0.04 M Reaction 3 5.0 ml : 0.100 M = 25.0 ml : n'3 M n'3 = ( 5.0 ml × 0.100 M ) / 25.0 ml = 0.02 M ※ Relative rate of reaction (100/t, t : spend time until change of color) - Rate of reaction 1 : 100 / 70 ≒ 1.43 Rate of reaction 2 : 100 / 140 ≒ 0.71 Rate of reaction 3 : 100 / 116 ≒ 0.86 ※ Temperature of reaction mixture : 20.0 ℃ ※ Order of reaction rate = k I-m S2O82- n Use result of experiment 1, 2 Rate of reaction 1 : 1.43 = k 0.08 m 0.04 n Rate of reaction 2 : 0.71 = k 0.04 m 0.04 n Rate`of`reaction`1 over Rate`of`reaction`2 `=` 1.43 over 0.71 `=`2 ^ m `=`2.01 , m`=` log`2.01 over log`2 ` image `1.01 ∴ m = 1.01 Rate of reaction 1 : 1.43 = k 0.08 m 0.04 n Rate of reaction 3 : 0.86 = k 0.08 m 0.02 n Rate`of`reaction`1 over Rate`of`reaction`3 `=` 1.43 over 0.86 `=`2 ^ n `=`1.66 , n`=` log`1.66 over log`2 ` image `0.73 ∴ n = 0.73 Order of reaction : m = 1.01 / n = 0.73 ※ Rate constant rate = k I-m S2O82- n k = Relative rate of reaction / I-m S2O82- n Rate constant of reaction 1, k1 = 1.43 / 0.08 1.01 0.04 0.73 = 192.18 Rate constant of reaction 2, k2 = 0.71 / 0.04 1.01 0.04 0.73 = 192.16 Rate constant of reaction 3, k3 = 0.86 / 0.08 1.01 0.02 0.73 = 191.70 Average of rate constant of reaction, k = ( 192.18 + 192.16 + 191.70 ) / 3 = 192.01 ∴ k = 192.01 Discussion This experiment is measuring time that is elapsed when the color of solution started to change color. But at that moment, the elapsed time during experiment might be depend on who does measure. This experiment is clock reaction which include rate determining steps. In this reaction, there is rate constant K which is unrelated to concentration and related to temperature. We can say value of K depends on temperature. So, K is a function of T. Therefore, to get exact data, we must maintain a constant room temperature. When we did the experiments, but, we did not maintain temperature. I think there was difference of temperature, little bit. It can cause error. 하고 싶은 말 좀 더 업그레이드하여 자료를 보완하여, 과제물을 꼼꼼하게 정성을 들어 작성했습니다. 위 자료 요약정리 잘되어 있으니 잘 참고하시어 학업에 나날이 발전이 있기를 기원합니다 ^^ 구입자 분의 앞날에 항상 무궁한 발전과 행복과 행운이 깃들기를 홧팅 키워드 레포트, 실험, 화학실험