Synthesis of methyl orange, The strength of acid, and H₇NO₃S(sulfanilicacid) Synthesis of methyl...
Transcript of Synthesis of methyl orange, The strength of acid, and H₇NO₃S(sulfanilicacid) Synthesis of methyl...
C₆H₇NO₃S(sulfanilic acid)
Synthesis of methyl orange, The
and The relationship with each color
Synthesis of methyl orange, The
and The relationship with each color
IntroductionAkira Suzuki was awarded a Nobel prize in 2010. Mr. Suzuki’s experiment is called Suzuki
a key of the study called the organic synthetic study. It used lots of fields. Above all, medicine is necessary for doctors which I want to
become to treat diseases. Thus, I wanted to do an experiment like this experiment in
coupling reaction in my experiment. Furthermore, I focusd on Methyl orange. Methyl
Finally, I made up my experiment purpose as follows.
①Synthesis and creation of methyl orange
②Find a relation between pH change and color of methyl orange which is influenced by the strength of the
�Color : reddish orange
�Structural formulaConstruction form↑
C₈H₁₁N(dimethyl aniline) 3mlNaOHaq (1mol/L) NaCl 25gH₂O
Synthesis and creation of methyl orange �preparation
Week Week acid
yellow
strength
Something to want to analyze Something to want to analyze
red
Construction of methyl orange
Na₂CO₃ 2g NaNO₂ 1.8gNaOHaq (1mol/L) NaCl 25gH₂O
125ml HClaq 60ml(3mol/L)
�Method of synthesis
C₆H₇NO₃S (white)
C₈H₁₁N (white)
←Sulfanilic acid and
dimethyl aniline to
make Methyl orange.
Adjustment of sulfanilic acid
color: reddish brown
Adjustment of sulfanilic acid①Dissolve sulfanilic acid into a mixture
of water and sodium carbonate, and heat the mixture.
color:transparent and colorless②Add sodium nitrite allowing the
mixture to get cool and after that, add a mixture of hydrochloric acid and water.
color: reddish brown
Adjustment of dimethyl aniline
color:transparent and colorless
Adjustment of dimethyl aniline①Mix dimethyl aniline and hydrochloric acid in another beaker, and cool the mixture.
color:transparent and colorless
�Method
①mixed these two materials.color:dark red
②controlled the pH by adding sodium hydroxide. color:orange
③Precipitation occured by adding sodium chloride.④Performed a vacuum filtration.
�Product
I was able to make methyl orange I was able to make methyl orange I was able to make methyl orange I was able to make methyl orange 0.8g0.8g0.8g0.8g from from from from 8.0g8.0g8.0g8.0g materials.materials.materials.materials.
((((Collection rateCollection rateCollection rateCollection rate 10101010%)%)%)%)
www.aichi-c.ed.jp/contents/rika/koutou/kagaku/ka3/metir/metir.htmwww.aichi-c.ed.jp/contents/rika/koutou/kagaku/ka3/metir/metir.htm
�Results
The percentage of permeation of each color influenced by
aqueous
conclusion
・I made methyl orange by
・optical
1)江藤康文 色
3)東京工業大学化学実験室
4)愛知エースネット
6)科学技術コミュニケーション教育研究部門(科学技術コミュニケーション教育研究部門(科学技術コミュニケーション教育研究部門(科学技術コミュニケーション教育研究部門(
References
The strength of acid,
The relationship with each color
The strength of acid,
The relationship with each color
Nobel prize in 2010. Mr. Suzuki’s experiment is called Suzuki-Miyaura Coupling. This experiment becomes
It used lots of fields. Above all, medicine is necessary for doctors which I want to
an experiment like this experiment in my school science laboratory ,so I used the Diazo
on Methyl orange. Methyl orange which is used as a dye and indicator.
Find a relation between pH change and color of methyl orange which is influenced by the strength of the acid
試験管の写真
Week Week acid
yellow
Strong Strong acid red
strength of acid and relation with methyl orange color
Something to want to analyze Something to want to analyze
White light � Control pH
波長は 440 ~ 680 nm
Check performance by coloration of methyl orange I made.
�Analyze optical properties by using an absorptiometer
Analyze like this way→
Inner figure
White light � Control pH pure hydrochloric acid pH2(red)controlled hydrochloric acid pH5(yellow)
Results
The percentage of permeation of each color influenced by
aqueous solution.
The opposite color is absorbed based on the color
that we recognize.
conclusion
I made methyl orange by diazo coupling.
acidity neutrality basicity
optical property …I made a graph of color changes according to differences of pH.
その科学と文化 朝倉書店 1979 2)L.F.フィーザー フィーザー有機化学実験 丸善 1980
)東京工業大学化学実験室 理工系大学基礎化学実験第3版 講談社サイエンティフィク 2008
)愛知エースネット メチルオレンジの合成 5)Nobelprize.org – All about the Nobel Prize Awarded Achievements, http://nobelprize.org/,((((2011/02/22))))
科学技術コミュニケーション教育研究部門(科学技術コミュニケーション教育研究部門(科学技術コミュニケーション教育研究部門(科学技術コミュニケーション教育研究部門(CoSTEP)鈴木・宮浦カップリング反応とは)鈴木・宮浦カップリング反応とは)鈴木・宮浦カップリング反応とは)鈴木・宮浦カップリング反応とは http://costep.hucc.hokudai.ac.jp/channel/anime/index.html
References
red yellow