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化学 高校生

化学基礎の酸化還元滴定についてこの問題の解説で過酸化水素のモルが何故出せるのか、ヨウ素のモルは何故出るのかが分かりません。解説をお願いします

センター試験の過去問を利用して計算問題に取り組んでみよう。 (2017 化学基礎追試) (問題)十分な量のヨウ化カリウム KI の水溶液に, 硫酸酸性の過酸化水素 HzO。 の水溶液 を加えて酸化すると, ヨウ素 。 が生成した。 消費した HzO。 の質量と生成した の物質量の 関係を表す直線として最も適当なものを選べ。 (原子量 H1 O 16) 606エーーテーテーェーーエーエーーー]O 0.0ほ を |@ 【 た 0.03 | 由 の @⑧ 者 002 【 SD Mi 00】 | @9 0 - ーー ご) 4 0 0 0.2 03 4 清費したHO』 の質量 (g] 元の問題は半反応式が書かれていません。 自分で書くしかないです。 (O) HLO。+ 2F +2e 一テ 2HLO (R) 2[ 一 L+2e この後は HzO。の質量から lz の mol を見てもよいし, その逆の方向でも構いません。 HzO。 の 分子量は 34 なので, 0.34g と仮定してみます。 すると, 過酸化水素は 0.01mol なので, 過酸化水素一電子の係数は 1つつ2 であり, e_ は 0.02mol 移動しています。(R)の式のe も 0.02mol となり, 電子一 の係数は 2つ1 なので, ヨウ素は 0.01mol 生成していることがわかりま す。 HzO。 0.34g に対応するヨウ素が 0.01Imol なのは④ですね。

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英語 高校生

高校1年です。LANDMARCの問題です。宜しければ教えて下さい。

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英語 高校生

答え、問1→6、問2→2、問3→1で合ってると思いますか??

ne's Day in Japan 6) mツ dad suggested 近. T ] decided to study in Japan just becans (becauseit felt t about giving up on going to Japan many times Tfollowed my dad's advice too much. Tworried and asked Tmaking the right decision?” oO ce T arrived in Japan, T saw man One wasiwhatlpeople do on Yalentine's Day in Japan. Girls chocolates to boys to tell them they are interested in them。 4 too. Boys only | 10 myself。 | 5s y things that T couldnt es girls give chocolates to many other boys, ive chocolates. TI learned all about this on Valentine's Day by ly receiving chocolates from five girls. This is quite different hat we do in America. In America, couples spend Gime together tine's Day and often give gifts to each other. anese people also have White Day, which is one month after ne's Day. Boys give chocolates to girls who gave them tes on Valentine's Day. 1 didnt know about this custom until T didnt have any good friends in Japan. felt sad and was not ng mauch to anyone. Returning a chocolate gift on White Day snt on my mind. One of the girls who gave me chocolates in February asked meせt 0 Be about White Day and explained all about i. 1 felt really bad. apelegized for not giving her chocolates and asked her才was too Jate to inyite her to go see a movie on the weekend. Valentine's Day was just one of many things that helped me enjoy my hfe in Japan. Tjoined the judo club and practiced with other boys. My glassmates and T won the singing contest at the school festival. 1 am 本ad 好at my dad suggested studying Japanese and living in Japan. (第 3 回一 11)

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