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Chemistry Undergraduate

分析化学二です。 サイエンス社の分析化学の教科書より、3.4.5.7の解説をどなたかにして頂きたいです💦

Ka1= 1.7× 10-4, Ka2 = 1.5×10-7, Ka3 = 5.9×10-10, Ka4 = 1.4x10~10 の EDTA 滴定に関して,以下の問に答えよ (2) pH = 6.00において, 2.0 × 10-2 M Cu?+溶液 25.0㎡Lを 2.0×10~M 1分子のLはCu?+ に対して最大で「ア]座配位子として配位する. この場合, LにH* が付加した化学種 Hs-nL(5-n)+ (n=1~4) は以下のように酸解離し, (1) pH3 における Ca°+ と Pb?+の EDTA キレートの条件付き生成定数K' 2+ を求めよ。 (2) pH3 の 0.0250 M Pb*+ 溶液 20.0mL を 0.0100M EDTA 溶液で滴定す る。当量点における Pb?+ 濃度を求めよ。 (3) Ca°+ が共存した場合,上記の当量点において[CaY?-1/[Ca°+] 比はいく らになるか? また, この結果から, 共存する Ca°+ は Pb?+ の定量を妨害 するか否かを説明せよ。 4 Cd'+, Ti*+, Sr°+ のそれぞれについて, log K; = 8となる PHを求めよ。 5 黄銅に含まれる銅と亜鉛を EDTA 滴定で定量する実験計画を立てよ。 6 Excel を用いて, PH10 および PH12 において 0.010M Ca?+溶液 50.0mLを 0.010 M EDTA 溶液で滴定するときの滴定曲線をシミュレートせよ。 7 トリエチレンテトラミン (NH2CH2CH2NHCH2CH2NHCH2 CH2NH2, 以) Lとする)は, Cu?+ に対して高い選択性をもつキレート滴定試薬である. Lと Cu°+ とのキレート生成反応式および生成定数は次のようである. 計 Cu°+ +L= CuL"+ [CuL?+] Kf = 7.9× 1020 ニ [Cu2+] [L 1分子のLは Cu?+ に対して最大で「ア座配位子として配位する. この CuL+ 錯体はイつの[ウ]員キレート環からなる構造をとる。 -れ H][H4-nL(4-m)+] [Hs-nL(5-n)+] Hs-nL(5-n)+ 一F+H4-,L(4-n)+ Kan -10 ニ である。 (1) ア]~ ニ ウにあてはまる適切な数を記せ. Cu?+ の濃度を計算せよ.。

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TOEIC・English Undergraduate

これ読んだんですけど、自分は世界史を理解してなかったので分からなくて翻訳アプリ使ったんですけどそれでも分からなかったので分かる方できれば解読お願いします┏●

Denmark in World War II お んれ By Hannah Arendt Hannab Arendt (1906-1975) was a political scientist! and pbilosopber born in Hanover, Germany. Wben Hitler came to power, sbe was forced to leave Germany and came to the United States in 1940. Sbe continued ber academic career by lecturing and teacbing at arious colleges, including The New Scbool for Social Researcb in New York City. Among the many books sbe urote were Eichmann in Jerusalem, On Revolution, and The Origins of Totalitarianism. Editor's Insert During the Second World War. the Germans invaded Denmark in April, 1940. In the beginning of her essay, Hannah Arendt explains that of the four countries almost completely immune to anti-Semitism- Denmark, Sweden, Italy, and Bulgaria Denmark challenged its German masters directly. As soon as the German authorities talked about forcing Jews to wear the yellow badge,' the Danes replied that all Danish citizens, including the King, would be wearing it the next day if the policy were carried out. In addition, all Danish government officials threatened 舌は the German authorities with their immediate resignation if the Germans started to implement any anti-Jewish actions. The following excerpt from Eicbmann in Jerusatem shows how the Danes sabotaged the German plan to carry out the mass extermination of the Jews. only 2タカ人の What happened then was truly amazing; compared with what took place in other European countries, everything went topsy-turvey. In August, ー after the German offensive in Russia had failed, the Afrika Korns 1943 had surrendered in Tunisia, and the Allies had invaded Italy すgovernment canceled its 1940 agreement with Germany which had permitted German troops the right to pass through the country. Thereupon. the Danish workers decided that they could help a bit in hurrying things そのうえに up: riots broke out in Danish shipyards, where the dock workers refused to repair German ships and then went on strike. The German militarv commander proclaimed a state of emergency and imposed martial la and Himmler thought this was the right moment to tackle the Te the Swedish す。 (continued on next page) themselves as Jews secret police), and overseer of the concentration camps

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