 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 1269 | 回復(fù): 3 | ||
| 當(dāng)前只顯示滿足指定條件的回帖，點(diǎn)擊這里查看本話題的所有回帖 | ||
climbnail銅蟲 (小有名氣)
|
[求助]
0.1 N高氯酸 與 0.1 N高氯酸in醋酸 一樣嗎？
|
|
|
請問各位高手 USP36里面有用 0.1 N perchloric acid VS滴定的實(shí)驗(yàn) 這里的0.1 N perchloric acid VS是怎么配的？ 這個(gè)0.1 N perchloric acid VS和下面這個(gè)是一個(gè)東西嗎？ Perchloric acid ( 0.1 N高氯酸在醋酸標(biāo)準(zhǔn)液 ) in anhydrous acetic acid, for titrations in non-aqueous media c(HClO4) = 0.1 mol/l (0.1 N) TitriPUR® |
回復(fù)此樓» 猜你喜歡
調(diào)劑310
已經(jīng)有11人回復(fù)
-
300求調(diào)劑，材料科學(xué)英一數(shù)二
已經(jīng)有9人回復(fù)
-
296求調(diào)劑
已經(jīng)有3人回復(fù)
-
一志愿南昌大學(xué)324求調(diào)劑
已經(jīng)有3人回復(fù)
-
299求調(diào)劑
已經(jīng)有9人回復(fù)
-
22408 359分調(diào)劑
已經(jīng)有6人回復(fù)
-
085600 材料與化工 329分求調(diào)劑
已經(jīng)有12人回復(fù)
-
一志愿北京化工大學(xué)材料與化工（085600）296求調(diào)劑
已經(jīng)有14人回復(fù)
-
085601材料工程找調(diào)劑
已經(jīng)有11人回復(fù)
-
總分293求調(diào)劑
已經(jīng)有9人回復(fù)
» 本主題相關(guān)價(jià)值貼推薦，對您同樣有幫助:
- 求助求助！我想用非水滴定法測定總生物堿含量，如何標(biāo)定高氯酸呢？？
已經(jīng)有7人回復(fù)
- 高氯酸/冰乙酸 非水滴定法 測定仲胺基的含量 的原理
已經(jīng)有8人回復(fù)
- 高氯酸在冰醋酸溶液中氧化性如何
已經(jīng)有11人回復(fù)
- 【求助/交流】土壤分析實(shí)驗(yàn)方法求助，提供百金（100J）
已經(jīng)有18人回復(fù)
- 中藥化學(xué)成分的預(yù)試驗(yàn)大全
已經(jīng)有4人回復(fù)
- 【求助】誰能給我一份有機(jī)顯色基團(tuán)表
已經(jīng)有15人回復(fù)
climbnail
銅蟲 (小有名氣)
- 應(yīng)助: 1 (幼兒園)
- 金幣: 388.8
- 帖子: 122
- 在線: 8.4小時(shí)
- 蟲號: 691132
- 注冊: 2009-01-11
- 性別: GG
- 專業(yè): 有機(jī)分析
3樓2013-06-05 15:22:03
yugijiang
木蟲 (著名寫手)
- 應(yīng)助: 661 (博士)
- 貴賓: 0.005
- 金幣: 4018.4
- 紅花: 11
- 帖子: 1790
- 在線: 178小時(shí)
- 蟲號: 416091
- 注冊: 2007-06-29
- 性別: GG
- 專業(yè): 藥物分析
【答案】應(yīng)助回帖
★ ★ ★ ★ ★
感謝參與，應(yīng)助指數(shù) +1
climbnail: 金幣+5, 謝謝！但等進(jìn)一步告訴我這個(gè)資料的出處嗎？ 2013-06-05 15:21:54
感謝參與，應(yīng)助指數(shù) +1
climbnail: 金幣+5, 謝謝！但等進(jìn)一步告訴我這個(gè)資料的出處嗎？ 2013-06-05 15:21:54
|
Perchloric Acid, Tenth-Normal (0.1 N) in Glacial Acetic Acid HClO4, 100.46 10.05 g in 1000 mL [NOTE—Where called for in the tests and assays, this volumetric solution is specified as “0.1 N perchloric acid.” Thus, where 0.1 N or other strength of this volumetric solution is specified, the solution in glacial acetic acid is to be used, unless the words “in dioxane” are stated. [See also Perchloric Acid, Tenth-Normal (0.1 N) in Dioxane.] ] Mix 8.5 mL of perchloric acid with 500 mL of glacial acetic acid and 21 mL of acetic anhydride, cool, and add glacial acetic acid to make 1000 mL. Alternatively, the solution may be prepared as follows. Mix 11 mL of 60 percent perchloric acid with 500 mL of glacial acetic acid and 30 mL of acetic anhydride, cool, and add glacial acetic acid to make 1000 mL. Allow the prepared solution to stand for 1 day for the excess acetic anhydride to be combined, and determine the water content by Method I (see Water Determination 921), except to use a test specimen of about 5 g of the 0.1 N perchloric acid that is expected to contain approximately 1 mg of water and the Reagent (see Reagent under Method Ia in Water Determination 921) diluted such that 1 mL is equivalent to about 1 to 2 mg of water. If the water content exceeds 0.5%, add more acetic anhydride. If the solution contains no titratable water, add sufficient water to obtain a content of between 0.02% and 0.5% of water. Allow the solution to stand for 1 day, and again titrate the water content. The solution so obtained contains between 0.02% and 0.5% of water, indicating freedom from acetic anhydride. Standardize the solution as follows. Accurately weigh about 700 mg of potassium biphthalate, previously crushed lightly and dried at 120 for 2 hours, and dissolve it in 50 mL of glacial acetic acid in a 250-mL flask. Add 2 drops of crystal violet TS, and titrate with the perchloric acid solution until the violet color changes to blue-green. Deduct the volume of the perchloric acid consumed by 50 mL of the glacial acetic acid. Each 20.423 mg of potassium biphthalate is equivalent to 1 mL of 0.1 N perchloric acid. |
2樓2013-06-05 14:22:55
yugijiang
木蟲 (著名寫手)
- 應(yīng)助: 661 (博士)
- 貴賓: 0.005
- 金幣: 4018.4
- 紅花: 11
- 帖子: 1790
- 在線: 178小時(shí)
- 蟲號: 416091
- 注冊: 2007-06-29
- 性別: GG
- 專業(yè): 藥物分析
4樓2013-06-05 16:43:46
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 300求調(diào)劑，材料科學(xué)英一數(shù)二 +9 | leaflight 2026-03-24 | 9/450 |
|
|---|---|---|---|---|
|
[考研] 309求調(diào)劑 +7 | 誰不是少年 2026-03-29 | 7/350 |
|
|
|
[考研] 086000生物與醫(yī)藥調(diào)劑 +5 | Feisty。 2026-03-28 | 9/450 |
|
|
|
[考研] 343求調(diào)劑 +6 | 愛羈絆 2026-03-29 | 6/300 |
|
|
|
[考研] 318一志愿吉林大學(xué)生物與醫(yī)藥 求調(diào)劑 +4 | 篤行致遠(yuǎn). 2026-03-28 | 4/200 |
|
|
|
[考研] 321求調(diào)劑 +7 | 璞玉~~ 2026-03-25 | 8/400 |
|
|
|
[考研] 一志愿哈爾濱工業(yè)大學(xué)材料與化工方向336分 +9 | 辰沐5211314 2026-03-26 | 9/450 |
|
|
|
[考研] 070300化學(xué)求調(diào)劑 +4 | 起個(gè)名咋這么難 2026-03-27 | 4/200 |
|
|
|
[考研] 求調(diào)劑 +4 | 零八# 2026-03-27 | 4/200 |
|
|
|
[考研] 07化學(xué)280分求調(diào)劑 +10 | 722865 2026-03-23 | 10/500 |
|
|
|
[考研] 08開頭275求調(diào)劑 +4 | 拉誰不重要 2026-03-26 | 4/200 |
|
|
|
[碩博家園] 北京林業(yè)大學(xué)碩導(dǎo)招生廣告 +6 | kongweilin 2026-03-26 | 8/400 |
|
|
|
[考研] 317求調(diào)劑 +7 | 蛋黃咸肉粽 2026-03-26 | 7/350 |
|
|
|
[考研] 材料與化工328分調(diào)劑 +6 | 。，。，。，。i 2026-03-23 | 6/300 |
|
|
|
[考研] 一志愿南航 335分 | 0856材料化工 | GPA 4.07 | 有科研經(jīng)歷 +6 | cccchenso 2026-03-23 | 6/300 |
|
|
|
[考研] 282求調(diào)劑 +3 | wcq131415 2026-03-24 | 3/150 |
|
|
|
[考研] 277分求調(diào)劑，跨調(diào)材料 +3 | 考研調(diào)劑lxh 2026-03-24 | 3/150 |
|
|
|
[考博] 26申博自薦 +3 | whh869393 2026-03-24 | 3/150 |
|
|
|
[考研] 接收2026碩士調(diào)劑(學(xué)碩+專碩) +4 | allen-yin 2026-03-23 | 6/300 |
|
|
|
[考研] 328求調(diào)劑 +4 | LHHL66 2026-03-23 | 4/200 |
|