学年

教科

質問の種類

化学 高校生

下線部のところです。 総濃度⑥式における〜は分かるのですが、その後の⑤式で生じたNa+の濃度の和というところが分からないです。 なぜNa+の濃度を足すんですか?以降の⑥の式はHSO4-の電離式なので寧ろHSO4-の濃度を足すべきなのではないんですか?Na+とHSO4-の濃度... 続きを読む

0.104 K Kb = = 0.52Kkg/mol 0.200mol/kg 問4 問題文に与えられたように,希薄溶液の凝固点降下度ATは一般に, AT = Ki・m ...④ で表される。つまり, 凝固点降下度AT [K] は,質量モル濃度 m 〔mol/kg] に比例する。 ただし,溶質が電解質の場合は注意が必要である。 一般に凝固点降下度は溶質の種類 には関係なく,溶質粒子の数によって決まる。 そこで, 電離によって溶質粒子の数が 増える場合, 凝固点降下度ATは電離によって増加した溶質粒子の総物質量(総濃度) に比例する。 硫酸水素ナトリウム NaHSO4 は次の ⑤式のように完全に電離するので, ms [mol/kg〕 のNaHSO 水溶液の物質収支は次のとおりである。 点 A AT Ka m: NaHSO4 → Na+ + 電離前 ms 0 電離量 電離後 -ms 0 +ms ms HSO- 0 [mol/kg〕 +ms (mol/kg)] ms[mol/kg] 生じたms [mol/kg〕 の硫酸水素イオン HSO4は⑥式のように電離し、電離平衡に 達しており,そのときの物質収支は電離度 αを用いて表すと次のとおりである。 HSO4 H+ + SO42- •⑥ 計 電離前 ms 0 ms 電離量 -msα +msa +msa +msa 平衡時 ms (1 - a) msα msa ms (1+α) [mol/kg〕 [mol/kg〕 [mol/kg] よって,溶質粒子の総濃度は⑥式におけるHSOHSO2の濃度の合計 ms (1 + α) 〔mol/kg] と⑤式で生じた Na+の濃度ms [mol/kg〕 の和であるので,溶質 粒子の総濃度をms とαを用いて表すと、 m=ms (1+α) +ms =ms (2+α) 〔mol/kg] また, NaHSO4 水溶液の質量モル濃度 ms は 0.100mol/kg より, m=ms (2+α)=0.100 (2+α) [mol/kg] ④式に AT = 0.420 K, Ki = 1.85K kg/mol, m=0.100 (2+α) 〔mol/kg] を代入すると、 0.420 = 1.85 x 0.100 (2+α) α = 0.270...≒0.27 問5 図ウは純溶媒と不揮発性物質が溶解した希薄溶液の冷却曲線を比較したもので ある。 - 純溶媒 希薄溶液の冷却曲線の特徴は, 純溶 蝶と異なり図ウのRX間のように、 凝固が進むにつれて液温がゆっくり下 温 がっていく点で RATAT TAT Ite

未解決 回答数: 0
英語 高校生

教えて欲しいです。単元は動詞の語法です

1. When I realized I was wrong, I apologized ( Dhim my mistake 3 to him my mistake him for my mistake to him for my mistake 2. I graduated ( ) high school in 2015.m 1 from duo@for 3. We ( ) the problem of poverty. ①discussed 3 discussed of インター bist 4. Do you think I ( ) my elder sister? Dresemble resemble with (立正大) 4 of ③at de (酪農学園大) discussed about the discussed with して楽しめる b biabidea (東洋大) 3 resemble for b①am resembling 5. Kate () her baby boy on the bed after dinner. bid oa ed or blu ①laid lain give/tal 3lay 9131 (京都産業大) lie blow- em evig bnim LOV (広島修道大) ①raise ②rise wwo no alim to no 6. Please ( ) your hand if you want to ask a question. to baim w prey set up hard ratake up Sunda tegral 'nob 98819 7. Because of the bad weather, I decided ( ) out. ①not to go vud king/from home last night, to not going ③not going ④going not yud o (清泉女子大) guinisque beringsr 8. The repair shop failed ( ) my car. (東北芸術工科大) ①to fix 2 to affix ③fixed ④fix Ieva un baimer) Botong sandT 9. There was a big fire yesterday. Fortunately, everybody managed (). 011 (亜細亜大) Descape escaped Bevig 3 would escape aDob to escape 10. I closed my eyes and pretended ( ) asleep. o be Last wee toob edT 880 of Obe evig(玉川大) being 3 of being to be toy mailliW bus arrotiv 280 (to) during the exam.

回答募集中 回答数: 0
英語 高校生

右下のクエスチョンの30.G-1 .G-2.Q-6 が分かりません。 至急教えていただきたいです。m(_ _)m

ara light, I heard someone calling, “Hi! Where are you 10n May 7, I started on my bicycle tour from Around the World on a Bike 1o Dennis was sharing a house with a friend and G-1 the Los Angeles airport.2 When I stopped at a tra作。 15 his wife, who happened to speak Japanese.1 I had dinner with them-fried chicken and fried potatoes headed?"3 It was a young man on a bicycle. with ice cream for dessert. (2Dennis took out 92 4I said, “New York!" something for me to read: it was a list of people who 5 Looking a little puzzled, he said, “Where did supported traveling cyclists. Dennis explained 20 that I could stay in any one of their homes with you say you're going?" free meals. "New York."” 4The directory was very useful. iWhile cycling ●While cyeling =D While 1"New York!" he repeated.) 8I could hardly understand his English; alll』 1 was cycling across America, I made full use of it, visiting 20 ●make ) use of ~ homes and meeting many friendly peoplel6Meeting 与use ~ ●igure out ~ 与understand ~ could figure out was that his name was Dennis and 25 Dennis and receiving this great gift on the very first TE that he was inviting me to his house.9 After a day of the trip made moment's hesitation, I accepted. me wonder at the mystery of human Montreal ア19 7/10 life!7So much of life Boston Chitago 30 depends on luck and リスへ Denver 24 Kansas City York chance. Grand Canyon /1 washingy DC 512 Nashville Los AngelesFlagstaf ーは自転車以外による移動 At the Grand Canyon, U.S.A. マイスクリーム fried (fraid ice cream [ais kri:m] dessert [dizd:rt] でート 転にする人 cyclist |sáikist] directory darekiari ほど~ない hardly [há:rdli] figure |f M える ずンス Dennis [dénis] hesitation [hèzitéifon] ためSい mystery |mistarilテ。 O-4 Where did Hirata meet Dennis? 0-5 How well did Hirata understand Dennis's English? 30. depend on ~ It all depends on the weather. G-1 Mr. Green, who was born in Japan, lives in New York now. G-2 Halloween is a good time for everybody to dress up. Q-6 What did Dennis give Hirata to read?

未解決 回答数: 1
1/3