Grade

Type of questions

English Junior High

1.(1)②、(2)②、(3)①、(4)③④⑧⑩、(5)③④⑤、(6)③④、(7)①④⑥、(8)①②③⑥、(9)の解説をして欲しいです。3枚目が答えです

英語科 〔文 法〕 1 次の各文の( )に入る最も適当な語(旬) を1つ 選びなさい。 3 I don't want to be a person ( things. mi 7 who says 1 what speaks which talks I whose tells 英語 ) bad They followed the instructions they ( by their homeroom teacher. Both Ken and I ( ) junior high school ア was give 1 were gave ry were given I were giving ad (1) students two years ago. 7 is イ am ウ was I are were ⑤Could you tell me ( ) a ticket? ) My brother is very good at ( baseball. 7 play plays playing I played to play 3 This computer is ( ) than that one. good I expensive ④ I enjoyed ( イ better ウ best important o) movies in my room. 7 where I can get イ where can I get ) how to buying 300 [中京大中京〕 where to buying I (3) Sarah says she can't come () she finishes her homework. 7 when if unless I after 2 I bought two books (1 yudar yesterday. ア write writing ) in English watch I watching b⑤Did your sister ( 7 study I studyed watches watched to watch studys ) science yesterday? studies studied ⑥ I want ( ) your e-mail address. ア know knows knew I knowing * to know ⑦Have you ever ( ) letters in Chinese? ア write writes writing I wrote written ウ wrote I written 3 Please come to the library, Frank. I'll be there between two (w ) three. A7 and 1 for to エ or Hiroshi and his family enjoyed ( ) at Hakuba last weekend. ア ski ウ 1 skiing for skiing I to ski ⑤5 Ben has an aunt ( He goes and stays with her every winter. ア what イ who ) lives in Hawaii. whose I where [ たちばな〕 (4) She is very proud ( ) her bonsai and ⑧ When Lucy () going home on a public bus last Friday, she saw her cousin in Lad the bus. 7 is am ウ are I was * were ⑨Emily is very ( ) because she goes to college from Monday to Friday and works part-time at a bookstore on weekends. 7 short busy I tall * large small [菊華] ) since (2) The number of car accidents ( 1992. 7 decreasing イ are decreased Gloves showing it to visitors. ア with イ of ウ to I in 2 ( ) we go to the movie theater? イ What don't ウ How are I Why don't ア Let 3 The baby was named ( 7 before after I over * since ④Mary has few friends. ( always with a lot of friends. Instead of ウ As for on Where do ) his uncle. to ) John, he is According to エ After all have been decreasing ⑤He has two other children ( I has been decreasing 2 How about ( ) a taxi instead of 7 besides 1 among Even if ) Alan. below walking there? I'm tired. 7 to taking taking I above * beside 6 Take the JR Line to Nagoya, and change ( ) there. ウ to call I calling you -147-

Waiting Answers: 0
Chemistry Senior High

4番の問題が分かりません。 解説の式の意味はわかるのですが、なぜ中和点で銀イオンと塩化物イオンの物質量が等しくなるのかが分かりません。

ⅣV 次の記述を読み, 下記の問いに答えよ。 なお、塩化銀とクロム酸銀の 溶解度積はそれぞれ 2.0×10 -10 (mol/L)2, 1.0×10-12 (mol/L)3 とし, 滴定の前後で溶液の温度変化はないものとする。また,原子量は Na = 23, C1 = 35.5 とする。 塩化銀などの難溶性の塩は水に溶けにくいが, わずかには溶解する。 こ の飽和水溶液における溶解平衡において,一定温度条件下ではイオンの 濃度の積(溶解度積)は一定である。このため、複数のイオンの溶解度 積の差を利用して塩化物イオンの濃度を求める手法が知られている。す なわち,塩化物イオンおよび添加したクロム酸イオンが硝酸銀と反応し て生じる沈殿の溶解度積の差を利用することで塩化物イオンの濃度を求 めることができる。 いま、市販のしょう油に含まれる塩化物イオンの濃度を以下の方法によ り測定した。 操作 1 しょう油を(A)5.0mL を正確に量り取り、水を加えて (B)正確に 250mLとした。 操作2 操作1で希釈した溶液 5.0mLを正確に量り取り 2%クロム 酸カリウム水溶液 1.0 mL を加えた。 この溶液を撹拌しながら 0.020 mol/L 硝酸銀水溶液で滴定し、溶液の色がわずかに橙赤色 を呈する点を終点とした。 滴定に要した硝酸銀水溶液は 15.38mL であった。 4 実験に用いたしょう油に含まれる塩化物イオンがすべて食塩 (塩化 ナトリウム)由来であると仮定したとき,このしょう油に含まれる食塩 の質量パーセント濃度は何%か, 整数で答えよ。 ただし, しょう油の密 度は 1.0 g/cm3 とする。 また, 加えた銀イオンは全て塩化物の沈殿になっ たものとする。

Waiting Answers: 1
43/1000