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化学 高校生

6→7の反応で、濃硝酸を加えることでCuSからCu2+になっているのはどんな反応なのですか?

Na+ [Ag, Pb²+, Cu²+, Fe3+, Al3+, Zn²+, Ca²+, 1 沈殿 溶液② 熱湯に溶かす 沈殿 4 K2CrO4(g) を加える 1 希塩酸を加える 過剰の NH3(aq) を加える 沈殿 3 溶液 ⑤ う 溶液Cu²+, Fe3+, Al3+, Zn²+, Ca²+, Na 2H2S(気)を通じ 沈殿 ⑥ 溶液7 濃硝酸 を加える 過剰の 溶液 ⑨ NH3(aq) を加える 溶液 ⑧ 13A4 沈殿 1 kad sun & tans 3 264 沈殿 13-√*10* S PHAYN Ca²+, Na+ (11) (13) (14) 16 ① Al(OH)3 18 Fe(OH)3 ↓ 溶液 13 希塩酸 を加える MROCKY 18 本 過剰のNaOH (aq) 4 H2S(気)を通じを加えるLOV 1gです 5 溶液 14 う 溶液 11 溶液 16 ②1 溶液を煮沸する ② 硝酸を加える 1. CO 7 Cu²+⑧ [Cu(NH3)4]2+ 3 過剰のNH3(aq) を加える 1.15 沈殿 15 中 (NH4)2CO3(aq) 希塩酸 を加える翼を少量加える 沈殿 17 溶液 19 □ 答え ① AgCl. PbCl2+ (2) (3) PbCrO4 AgCl↓ ⑤ [Ag (NH3)2] 変化⑥ Cus! 塩酸で酸性になっている水溶液にH2Sを通じているから. 酸性下でも沈殿する硫化物だけが沈殿する > 参照 p.75 が右に K4[Fe(CN)6] (aq) を加える 黄色沈殿 20 BAS Pb2+PbCl2は熱湯には溶ける 希塩酸 を加える C⑨ Ca²+ Na+, [Zn (NH3)4]2+ Zn²+はNH』と配位結合して錯イオン を形成する 参照 ハ 味方 Xa られる反応です S ⑩0 ZnSNH3 水で塩基性になっている水溶液にH2Sを通じているから, 中塩基性下なら沈殿するZnSも沈殿する 参照 p.75 12 CaCO3 202H MA 00 [Al(OH)4] AI (OH)3は両性水酸化物 $02 [Al(OH)4] +H+-Al(OH)3+H2Oが起こる [Al(OH 19 Ca²+弱酸(H2CO3) 遊離反応: CaCO3+2HCI→CO2+H2O+ CaCl2 Na+ 炎色反応は黄色 15 Fe(OH)3, Al(OH)3 02 S apk 1068& Fe3+中和反応: Fe(OH)3 +3HCI→ • FeCl3+3H2O 1.0268 68

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英語 高校生

4の解き方がわかりません。 例えば(a)で、続く文であくびを謝っていることも全て把握した上で、挨拶なのでpolitelyかと考えたのですが、なぜ誤りなのか教えていただきたいです。

13 Lucy is a British schoolgirl who lives in Oxford. She is talking to her father, Fred, in the kitchen of their home. Read the conversation below and answer the following questions. Lucy: (a) Good morning, Dad. Oh, sorry for yawning. What are you doing with that microwave oven? It looks heavy. Do you need a hand with moving it? Fred: I think I'll be OK, Lucy. I'm just going to put it in the car and take it to the city dump. Lucy: Couldn't you send it away to be repaired? Fred: It's ten years old and well out of warranty now, so I very much doubt that the manufacturer would do it. They probably don't even carry the spare parts anymore. Lucy: That's a shame. Oh, I know what! Why not take it to the Repair Café near my school? Fred: What's that? I've never heard of it. Lucy: It's brilliant! We visited it as part of our environmental science course recently. It's a meeting place where people can get together to mend broken items cooperatively. And have a chat and a cup of coffee! Fred: I'm all ears. Tell me more. Lucy: Well, the first Repair Café was started by a Dutch woman called Martine Postma in Amsterdam in 2009. (1) 彼女は,使い捨て文化で環境が破壊されて, ゴミの量が地球規模で増えることを心配してたん . She wanted to find a local solution to this global problem. Fred: That's what they call "thinking globally, acting locally," isn't it? Lucy: Exactly. She also wanted to address the decline in community spirit amongst urban dwellers and do something about people's loss of practical skills and ingenuity. Fred: And the idea (2) caught on? Lucy: Very much so. The concept has grown into a global movement. The one in Oxford started about four years ago. Fred: Impressive! What kind of things do they repair? Lucy: Oh, all sorts. Electrical appliances, clothes, furniture, crockery, bicycles, and even toys. Fred: How successful are they at repairing things? Lucy: Well, of course, they cannot guarantee to fix every item brought to them, but they have a fairly good success rate. One study found that on average 60 to 70 percent of items were repaired. The rate is higher for some items such as bicycles and clothes but lower for things like laptop computers. Fred: I can understand that. Just between you and me, I think some electronics manufacturers deliberately make products in such a way that you cannot disassemble them and repair them unless you have specialized tools and equipment. Lucy: Yes, and that's where Repair Cafés can help. But these cafés are not just about repairing things for people. They are places where we can meet others, share ideas, and be inspired. The volunteer repairers are very keen to involve the visitors in thinking about the repair and actually carrying out the repair themselves. They also encourage people to think about living together in more sustainable communities. Fred: I suppose you could say they are about repairing our minds, not just our things. Lucy: Quite so, although often the two are very closely related. Many people attach (3)sentimental value to old things that might, for example, be part of their family history. Fred: I see what you mean. It almost sounds too good to be true. (a)Is there a catch? For example, how much does it cost? Lucy: Advice and help from the repairers is free, but people who use the café are invited to make a donation. That money is used to cover the costs involved in running the café. If specific spare parts are needed, the repairers will advise you on how to obtain them. Fred: Well, that's marvelous! (e)Then I'll take this old microwave there. Are they open today? Lucy: Yes, and I'll come with you. I've got a pair of jeans that are badly in need of some attention. QUESTIONS 1. Translate the underlined part after (1) into English. 2. What does the underlined phrase after (2) mean? Select the most appropriate expression from the list below. (A) became popular (B) hit a dead end (C) occurred to you (D) played a significant role (E) worked in practice 3. The underlined phrase after (3) means the value of an object which is derived from personal or emotional association rather than its material worth. Give ONE object that has "sentimental value" for you and explain why it has such value. Your answer should be between 15 and 20 English words in length. (Indicate the number of words you have written at the end of your answer.)

解決済み 回答数: 1