 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
小木蟲論壇-學術科研互動平臺 » 科研生活區(qū) » 專業(yè)外語 » 計算模擬 » 求助翻譯以下兩段英文
| 5 | 1/1 | 返回列表 |
| 查看: 591 | 回復: 2 | ||
| 【懸賞金幣】回答本帖問題，作者zhangajin將贈送您 20 個金幣 | ||
| 當前只顯示滿足指定條件的回帖，點擊這里查看本話題的所有回帖 | ||
zhangajin金蟲 (小有名氣)
|
[求助]
求助翻譯以下兩段英文 已有2人參與
|
|
|
In a 4-l. beaker, 290 cc. of water is heated to boiling, and 260 g. (1.1 moles) of crystallized sodium sulfide (Na2S·9H2O) and 34 g. of powdered sulfur are dissolved by heating and stirring. A solution of 40 g. of sodium hydroxide in 100 cc. of water is then added and the mixture cooled, first in cold water, and finally by a freezing mixture of ice and salt. In a 2-l. beaker, set in a freezing mixture and provided with a stirrer and a thermometer for reading temperatures to 0°, are placed 500 cc. of water, 137 g. (1 mole) of anthranilic acid, and 200 cc. of concentrated hydrochloric acid; the stirrer is started and the mixture cooled to about 6°. Meanwhile 69 g. (1 mole) of sodium nitrite is dissolved in 280 cc. of hot water and the solution cooled in ice; portions are then placed in a separatory funnel of convenient size, supported in such a way that the lower end of the stem extends beneath the surface of the anthranilic acid solution. When the temperature has fallen to 5°, the nitrite solution is run in; about 500 g. of cracked ice is added at such a rate as to keep the temperature below 5°. This takes about ten minutes (Note 1). A drop of the solution should give an immediate blue color with starch-iodide paper. The stirrer and thermometer are now transferred to the alkaline sulfide solution, the temperature of which must be below 5°. The diazo solution is added over a period of twenty to thirty minutes along with 950 g. of ice to prevent the temperature from rising above 5°. When addition is complete, the water bath is removed and the mixture allowed to warm up to room temperature; after two hours the evolution of nitrogen ceases (Note 2). About 180 cc. of concentrated hydrochloric acid is added until the solution is acid to Congo red paper, and the precipitate of dithiosalicylic acid is filtered and washed with water. |
回復此樓» 猜你喜歡
求調劑
已經(jīng)有4人回復
-
一志愿北京化工大學070300 學碩336求調劑
已經(jīng)有6人回復
-
考研調劑
已經(jīng)有3人回復
-
能源材料化學課題組招收碩士研究生8-10名
已經(jīng)有16人回復
-
318求調劑
已經(jīng)有5人回復
-
285求調劑
已經(jīng)有5人回復
-
306求調劑
已經(jīng)有3人回復
-
354求調劑
已經(jīng)有10人回復
-
303求調劑
已經(jīng)有5人回復
-
環(huán)境學碩288求調劑
已經(jīng)有4人回復
krispanlove
金蟲 (小有名氣)
- 應助: 26 (小學生)
- 金幣: 719.4
- 紅花: 21
- 帖子: 254
- 在線: 29.1小時
- 蟲號: 3898944
- 注冊: 2015-05-30
- 性別: MM
- 專業(yè): 環(huán)境工程
3樓2015-08-24 17:33:12
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 一志愿北京化工大學070300 學碩336求調劑 +4 | vv迷 2026-03-21 | 6/300 |
|
|---|---|---|---|---|
|
|
[考研] 384求調劑 +3 | 子系博 2026-03-22 | 4/200 |
|
|
|
[考研] 333求調劑 +5 | 87639 2026-03-21 | 7/350 |
|
|
|
[考研] 317求調劑 +9 | 申子申申 2026-03-19 | 15/750 |
|
|
|
[考研] 265求調劑 +12 | 梁梁校校 2026-03-19 | 14/700 |
|
|
[考研] 材料學學碩080502 337求調劑-一志愿華中科技大學 +4 | 順順順mr 2026-03-18 | 5/250 |
|
|
|
[考研] 306求調劑 +4 | chuanzhu川燭 2026-03-18 | 4/200 |
|
|
|
[考研] 機械專碩299求調劑至材料 +3 | kkcoco25 2026-03-16 | 4/200 |
|
|
|
[考研] 一志愿中國石油大學（華東） 本科齊魯工業(yè)大學 +3 | 石能偉 2026-03-17 | 3/150 |
|
|
|
[考研] 求調劑 +3 | Ma_xt 2026-03-17 | 3/150 |
|
|
|
[考研] 材料專業(yè)求調劑 +6 | hanamiko 2026-03-18 | 6/300 |
|
|
|
[考研] 304求調劑 +7 | 司空. 2026-03-18 | 7/350 |
|
|
|
[考研] 323求調劑 +3 | 洼小桶 2026-03-18 | 3/150 |
|
|
|
[考研] 324求調劑 +5 | lucky呀呀呀鴨 2026-03-20 | 5/250 |
|
|
|
[考研] 中南大學化學學碩337求調劑 +3 | niko- 2026-03-19 | 6/300 |
|
|
|
[考研] 295材料求調劑，一志愿武漢理工085601專碩 +5 | Charlieyq 2026-03-19 | 5/250 |
|
|
|
[考研] 材料學求調劑 +4 | Stella_Yao 2026-03-20 | 4/200 |
|
|
|
[考研] 一志愿中國海洋大學，生物學，301分，求調劑 +5 | 1孫悟空 2026-03-17 | 6/300 |
|
|
|
[考研] 286求調劑 +6 | lemonzzn 2026-03-16 | 10/500 |
|
|
|
[考研] 277調劑 +5 | 自由煎餅果子 2026-03-16 | 6/300 |
|