Grade

Type of questions

Chemistry Senior High

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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English Junior High

リーディングの問題です。 色付き下線部の英文の訳し方がよくわかりません。 どのようにして,回答のようになるのか教えて下さい🙇‍♀️

3 Jill, Ellen, Bob, and Edward lived near a lake/They could go for a swim every day. A man named Mr. Black lived near the lake, too./Sometimes Mr. Black went swimming with the children. One day they asked him to go for a swim with them./Mr. Black said "We can't go for a swim. We may never swim in the lake again." "Why not?" asked Edward. "Because the lake is polluted," said Mr. Black. "There's a new sign at the lake. It says No Swimming, Polluted." "What is polluting the lake?" asked Jill. "Let's go down to the lake and look at it," said Mr. Black. (ア) Mr. Black and the children went to the lake on a sunny Sunday. They looked into the water. It wasn't clean/They walked around the lake and they saw why it wasn't clean. “Look at that *garbage in the water," said Jill. "That's what's polluting the lake.” Edward saw oil floating on the water./"That oil pollutes the water, too,” said Edward. "It comes from boats on the lake." "Come here," said Ellen. "Take a look at this. There are tires in the lake !" "Why would people throw tires into a lake ?" asked Bob. "They just don't stop to think," said Mr. Black. "But they are not the only ones who pollute the lake. The people who run that factory pollute the water, too." Bob looked at Mr. Black/"What can we do? How can we stop the pollution ? he asked. "Well, we must get help from other people. We can't do it alone," said Mr. Black. Mr. Black had a friend who worked for a newspaper company. He asked him to help. The next day the story about the pollution was reported in the newspaper. Many people read about the story. They talked of the pollution. They talked of ways to clean it up. people met at the lake./They came to clean it up./ They cleaned out the garbage. Then they cleaned out the tires./They set up big cans. Then they put signs on the cans. The signs read, "Put Your Garbage Here." /People who lived near the lake came to help./People who had boats came to help./And, people from the factory also One day (イ) came to help. They knew that it would take a long time to get the lake clean again. But they did not give up. They all hoped that someday the "No Swimming” sign would come down and the people could swim in the lake again. 注) 〒garbage=ごみ

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