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English Senior High

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Lesson 19 , od ne mi m om a get their support. 5 He himself was through far-reaching reforms. He abolished slavery, introduced a *bureaucracv and 298628 ig piaum. ofh al nao o litmo of the 2010s, donated about 90% of his salary to charities which helped poor people. The he was often described as the world's *humblest head of state. Not all leaders are like them. Unfortunately, some leaders only care about their statis 15 When their popularity declines, they often try to shift the criticism onto others so as to maintain their power. The class system during the Edo period aimed at dividing people into classes and giving them contentment by encouraging them to look down on the lower classes. Hitler managed to win people's support by setting *Jews up as their enemies. It is quite difficult to satisfy everybody and unite a nation. Nevertheless, good leaders smo ons Tanolaom nd listen to people's voices, including critical ones, to make better policies for the welfare of 20 naw asng-1agie all the people from the perspective of national interests. So when you are qualified to vote, collect as much information as possible about candidates and political parties. It will help Coo b you judge whether they are willing to create a better society or are just trying to ake 25 advantage of their status for their own benefits. Your single vote can make a big differèIto to our future. oiauM 9oitasrf o eysW ) 363 words

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Physics Senior High

②です、①で求めたxを用いて計算していますが、 求めるのは酢酸の電離度で、xはCH3COOとHのイオン濃度なのになぜxが使えるのですか?

( 慶鷹義塾大 à の |299 電離定数 次の文中の(A)に適切な式, (B)に語句, ①~③に数(有効数字2桁)を入れよ。 また の はあとの語群から最も適切なものを選んで記号で答えよ。 酢酸を水に溶かすと, 電離したイオンと電離していない分子との間に, 次式のような logio2=0.30 平衡が成り立つ。 Tom CH COOH = CH3CO0 + H*..… (i) 式(i)の平衡定数 K。は酢酸の電離定数とよばれ, K。=(A と表される。 濃度0.20 molLの酢酸水溶液がある。式(i)の平衡における酢酸の濃度を0.20mol/L とみなすと, (この水溶液のpH| ただし, 酢酸の電離定数は2.00×10-5mol/L とする。 0.20 mol/L の酢酸水溶液 50.0mL に 0.20mol/Lの水酸化ナトリウム水溶液を加え ていく。このとき, 式(i)の平衡はB 液を25.0mL 加えた際の混合溶液の は® 」 ウム水溶液を50.0㎡L加え酢酸がちょうど中和されたときの溶液の pH はI だし, 中和の過程で混合溶液中の酢詐酸イオンの物質量は, 加えられた水酸化ナトリウム の物質量にほぼ等しいとみなせるものとする。 さ の であり, また酢酸の電離度は② である。 向きに移動する。この水酸化ナトリウム水溶 と算出される。 また, 水酸化ナトリ た [のの語群](a) 7より小さい (b) 7に等しい (c) 7より大きい

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English Senior High

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