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Chemistry Senior High

問8の(1)について、同体積の混合でなぜ各イオン濃度が1/2倍になるのか分からないので教えてくださいお願いします!!

定数をKa とすると, 小系 (1) 文中の空欄ア~ウには適語を,エには適する文字式を入れよ。 (2) 酢酸が0.30mol/L, 酢酸ナトリウムが0.10mol/Lで溶けている溶液がある。この溶液のpHを 小数第1位まで求めよ。 ただし、酢酸の電離定数K=2.7×10mol/L 10g103=0.48とする。 最皮 LIJ P100 :: PH = -logio ( 3+x156) = 6 - 4×0.48 = 4,08 = 4.1 // 電離 問8 2.0×10 合 沈殿が生じるかどうかを予測したい。 これに関して,次の各問いに答えよ。 したとき、 ただし、塩化銀AgClの溶解度積を1.8×10-10 (mol/L) とする。同体積混合…各イオン濃度が2倍に (1) 溶液を混合したときのイオン濃度の積[Ag+] [Cl-] (mol/L) の値を求めよ。 (2)沈殿生成の予測に関する次の文中に適する語句を入れよ。 [A][CN]=120x12=100 to 2.0×10mol/Lの塩化ナトリウム水溶液100mLを混 mol/Lの硝酸銀水溶液100mLと, (1)で求めた値を溶解度積と比較したとき, (1) の値が溶解度積よりも { 大きい・小さい}ため、 沈殿が生じる ・ 生じない}と予測される。 0 Sh (Mor) 問9 難溶性塩である硫化銅(II)CuSと硫化亜鉛ZnSの溶解度積は、 それぞれ6.3×10-30 および 2.1×10-18 (mol/L)' である。 (mol/L) 2 Cut およびZn²+ の濃度がいずれも0.10mol/Lである混合水溶液について, 硫化水素を通じて CuSだけを沈殿させるためのS" のモル濃度の範囲は、 どうなるか。 次の式中の①と②に入る を有効数字2桁で示せ。

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English Senior High

考えても分かりません。解答お願いします

20 Unit 1 - History - Gutenberg is famous for inventing printing, but he didn't really invent it. He invented a better way of printing. [2] For hundreds of years people used blocks of wood* to print. They used a knife to cut words backward in the block of wood. Then they covered the block with ink and pressed it onto paper. When they pulled the paper from the inky blocks, the words appeared on the 金属 5 paper in the right direction. In Korea and China, people printed with metal type* instead of 右向き wood. (2)Either way, printing was difficult and very slow. It took several years to make one copy of a book. [3] Books were very expensive and rare. Only ( 3a ) people could buy them, and ( 3b ) 10 people could not read. But, as ( 3c -) people learned to read, books became more popular. So people wanted to find a quicker, better and less expensive way to print books. One of these people was Johannes Gutenberg. opsugas.l Y tinU 9003 iinil 4 Gutenberg was born in Mainz, Germany, around 1400. He was good at working with metal, but probably had no idea how people printed in China. His idea was to make a piece Clarey operan 15 of metal type for each letter of the alphabet and use the letters (4)over and over. (5)He could put the type together to make words and arrange words to make pages. With ink on the type, he could press paper on them to print a page. A "printing press" machine could make hundreds of copies of a single page quickly. After that page, he could rearrange the same letters to make other words and print other pages. LISSH Si nou 5 It took Gutenberg a long time to make the type for each letter of the alphabet. When he finished the type, he didn't have enough money to make the printing press. He borrowed money from a man named Johann Fust. After many years, Gutenberg's printing press was Legione ready. Gutenberg printed his first book, the Bible, around 1455. 6 There are only twenty-one complete copies of the original Bible. They are some of the 25 most expensive books in the world. In 1987, part of a Gutenberg Bible sold for $5.3 million. 7 Today people remember Johannes Gutenberg. The city of Mainz has a statue of him and a museum. His original printing press is in the museum. (6)They print several pages a day to show that it is in good condition. earoviaU 012mu 394 words/#IN block of wood: type: vrigsypola 01 sind 7 an Oupside down & 下線部 (6) を日本 7. 本文の内容に合わ Many people & Gutenberg g Gutenberg Olt was a long Though Gu cost a lot of Hannes Rotest

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English Senior High

答えを教えて欲しいです

Past Tense, Past Progressive (2) Warm Up! (1) ( に入れるのに正しくないものを1つ選んでください。(b) Warm Up He began to practice karate only ( ). 1. recently 2. two weeks earlier 3. these days 4. one week ago Part 2: Grammar Section 《解説と解答》 「彼はつい最近 (2週間早く; 先週) 空手の練習を始めた」 という意味ですから、 3. these days のみが、 過去形の動詞と共に使えない表現です。 these days は 「このごろ (最近)」 という意味で すが、 現在形 現在進行形や現在完了形とともに用います。 Warm Up! (2) ( に入れるのに最適な表現を1つ選んでください。 John didn't want to see me because he () his lunch. 1. once had 2. was having 3. has 4. took 《解説と解答》 「ジョンは昼食中だったので、私に会いたがらなかった」 という意味ですから、 ジョンが私に会い たがらなかった理由を完成させます。 私に会いたがらなかった時に進行していた動作が「昼食を取る」 ことですから 2. was having の過去進行形にするのが適切です。 なお、 have lunch の have は 「食 べる (eat) 」 の意味ですから、この意味の場合haveは進行形で用いることができます。 Exercise 5: Fill in the blanks in these sentences with one of the choices below. 3. A pine tree (a) stands 1. While Cindy. (a) was playing (b) is playing (c) played her violin yesterday, two of her strings broke. (d) has played up late the night before to 2. My paper was due yesterday, so I complete it. (a) stayed (b) stood (b) would stay (c) stay (d) am staying at the gate, and a girl was standing in its shade. (d) standing (c) was standing 4. The car wasn't here yesterday because Jane takes the bus, but the drivers were on strike. (a) uses (b) is using (c) has used 5. One of the boys (a) fall (b) falls 6. When the door bell rang, I (a) take (b) am taking 7. Mr. Brown (a) leave (b) is leaving (d) was using in the river, but I dived in and saved him. (c) were falling (d) fell a shower. (c) was taking the office only a minute ago. (c) was leaving 8. During the last earthquake books (a) fall it. She generally (b) are falling (c) had been falling (d) taking (d) left from the shelf. (d) fell Unit 4 Exercise 6: Fill in the blanks in the passage below with the correct form of the verb in parentheses. The first one is done for you. Mark (live) lives in Japan. His family (come) five years ago, when his father (start) Osaka. At that time Mark was still only 10 years old, and he (do) not want to leave America. But now, he (have) Osaka, and he likes living there. During the last summer vacation, Mark (go) United States with his parents. They (visit) Washington D.C., and Boston, and (enjoy) They also (go) Mark's grandparents. His grandparents (be) see Mark. One evening, as they (eat) the telephone (ring) Mark and his parents (talk) over one hour. Now Mark is back in Osaka. He (want) his grandparents again. He is (plan). America by himself next time. to Japan his own business in many friends in back to the New York, seeing the sights. to a small town in Connecticut to (see) very happy to a big chocolate cake, It was Mark's aunt in California. with her one after another for to (visit) to go to

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