Znn3bq.jpeg
²é¿´: 313  |  »Ø¸´: 7
µ±Ç°Ö÷ÌâÒѾ­´æµµ¡£
¡¾ÐüÉͽð±Ò¡¿»Ø´ð±¾ÌûÎÊÌ⣬×÷Õßzhangdan127½«ÔùËÍÄú 4 ¸ö½ð±Ò

zhangdan127

½ð³æ (СÓÐÃûÆø)

[ÇóÖú] Çë½ÌÒ»¸öÎÊÌ⣿ÓÐЧÆÚÖÁ2008Äê8ÔÂ18ÈÕ

ÇëÎÊPH=5.8Ũ¶ÈΪ0.05mol/LµÄ´×Ëá-´×ËáÄÆ»º³åÈÜÒºÔõôÅäÄØ£¿

[ Last edited by zhangdan127 on 2008-8-18 at 07:58 ]

» ²ÂÄãϲ»¶

¸ÐлÉú»î£¬ÎÒ»¹ÓÐÊ¿É×ö£¬»¹ÓÐÊÂÇé¿ÉÒÔÈÃÎÒ·³ÄÕ¡£
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

beckham277

ľ³æ (Ö°Òµ×÷¼Ò)

ÄãËæ±ãÕÒ¸öÊÔ¼Á¹«Ë¾µÄ½éÉÜÊé¶¼ÓеĠ ºÇºÇ
2Â¥2008-08-16 22:31:29
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Cosima

ľ³æ (СÓÐÃûÆø)

¡ï
zhangdan127(½ð±Ò+1,VIP+0):ºÜºÃ
ÏÈÅä0.5mol/LµÄ´×ËáÈÜÒº£¬ÔÙÓÃÇâÑõ»¯ÄƵ÷pHÖÁ5.8¼´¿É
3Â¥2008-08-17 00:06:24
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

chenjie2058

½ð³æ (СÓÐÃûÆø)

ÔÞ³ÉÂ¥Éϵ쬵«ÊÇNAOHµÄŨ¶ÈÒ»¶¨µÄµÍ£¬Òª²»È»²»ºÃ¿ØÖÆPH
4Â¥2008-08-17 10:52:36
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

echem318

½ð³æ (ÕýʽдÊÖ)

˼·¾ö¶¨³ö·

To obtain 500 ml of 50 mM Piperazine buffer (pKa 5.55)

Dissolve 2.1535 g free acid in about 400 ml of pure water
Titrate with 1 M NaOH to pH 5.8 at 25¡ãC
Make up volume to 500 ml

ATTENTION
Be aware that the pH will change with temparature , buffer additives,...
ÎÒÊÇÒ»ÌõСС³æ£¬À´Ïò¸÷λѧϰµÎ~~
5Â¥2008-08-17 11:20:35
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

jiangshuxun

½û³æ (ÎÄ̳¾«Ó¢)

±¾ÌûÄÚÈݱ»ÆÁ±Î

6Â¥2008-08-17 11:52:54
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shengbide8

½ð³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
Originally posted by Cosima at 2008-8-17 00:06:
ÏÈÅä0.5mol/LµÄ´×ËáÈÜÒº£¬ÔÙÓÃÇâÑõ»¯ÄƵ÷pHÖÁ5.8¼´¿É

ÊÇÕâÑùµÄ£¬µ«ÒªÓÃÏ¡ÇâÑõ»¯ÄÆ
µÃÖ®ÎÒÐÒ£¬Ê§Ö®ÎÒÃü£¬ÈçÊǶøÒÑ
7Â¥2008-08-17 15:48:59
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ zhangdan127 µÄÖ÷Ìâ¸üÐÂ
²»Ó¦Öú È·¶¨»ØÌûÓ¦Öú (×¢Ò⣺ӦÖú²Å¿ÉÄܱ»½±Àø£¬µ«²»ÔÊÐí¹àË®£¬±ØÐëÌîд15¸ö×Ö·ûÒÔÉÏ)
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ²ÄÁÏÏà¹Ø×¨Òµ344Çóµ÷¼ÁË«·Ç¹¤¿ÆÑ§Ð£»ò¿ÎÌâ×é +9 hualkop 2026-04-12 9/450 2026-04-12 22:41 by kyle12138
[¿¼ÑÐ] 0854µ÷¼Á +9 ³¤¹­°Á 2026-04-12 11/550 2026-04-12 22:13 by paopaotu326
[»ù½ðÉêÇë] ɽ¶«Ê¡»ù½ð2026 +5 jerry681 2026-04-08 6/300 2026-04-12 08:33 by kudofaye
[¿¼ÑÐ] 312Çóµ÷¼Á +6 Àîºè·É·É 2026-04-06 6/300 2026-04-12 00:34 by À¶ÔÆË¼Óê
[¿¼ÑÐ] 277 ÊýÒ»104£¬Ñ§Ë¶£¬Çóµ÷¼Á +21 Æ¿×ÓPZ 2026-04-09 23/1150 2026-04-11 23:12 by labixiaoqiao
[¿¼ÑÐ] 0860004 Çóµ÷¼Á 309·Ö +9 Yin DY 2026-04-08 9/450 2026-04-11 22:55 by dongdian1
[¿¼ÑÐ] 293Çóµ÷¼Á +6 ÓÂÔ¶¿â°®314 2026-04-08 6/300 2026-04-11 10:08 by zhq0425
[¿¼ÑÐ] ²ÄÁÏÀà284µ÷¼Á +40 Ïë»»ÊÖ»ú²»Ïë½âÊ 2026-04-08 48/2400 2026-04-10 23:28 by 314126402
[¿¼ÑÐ] 287Çóµ÷¼Á +15 Fnhc 2026-04-07 21/1050 2026-04-10 19:09 by chemisry
[¿¼ÑÐ] 071000ÉúÎïѧµ÷¼ÁÇóÖú +17 zzzzwww 2026-04-09 20/1000 2026-04-10 15:55 by Çóµ÷¼Ázz
[¿¼ÑÐ] Ò»Ö¾Ô¸211£¬»¯Ñ§Ñ§Ë¶£¬310·Ö£¬±¾¿ÆÖصãË«·Ç£¬Çóµ÷¼Á +27 ŬÁ¦·Ü¶·112 2026-04-07 30/1500 2026-04-10 15:06 by Kilig0317
[¿¼ÑÐ] 293µ÷¼Á +25 yj1221 2026-04-08 26/1300 2026-04-10 15:02 by ²ñС°×
[¿¼ÑÐ] Ò»Ö¾Ô¸»¦9£¬326ÉúÎïѧÇóÏà¹Ø×¨Òµµ÷¼Á +4 Áõīī 2026-04-09 4/200 2026-04-10 12:07 by pengliang8036
[¿¼ÑÐ] 085601³õÊÔ330·ÖÕÒµ÷¼Á +10 Á÷ÐÄÄ̻ưül 2026-04-09 10/500 2026-04-10 08:14 by Sammy2
[¿¼ÑÐ] 332£¬085601Çóµ÷¼Á +12 ydfyh 2026-04-09 14/700 2026-04-09 17:28 by wp06
[¿¼ÑÐ] 337Çóµ÷¼Á +4 Gky09300550£¬ 2026-04-09 4/200 2026-04-09 17:18 by ÅÁ¶ûÂíÀ­ÌØ
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +10 18815505510 2026-04-09 11/550 2026-04-09 17:07 by 544594351
[¿¼ÑÐ] ²ÄÁϵ÷¼Á +14 Ò»ÑùYWY 2026-04-06 14/700 2026-04-08 23:00 by Öí»á·É
[¿¼ÑÐ] 275 Çóµ÷¼Á +8 Lei812514 2026-04-07 8/400 2026-04-08 12:46 by chemisry
[¿¼ÑÐ] 277¡¢Ñ§Ë¶£¬Çóµ÷¼Á ÊýÒ»104£¬ +11 Æ¿×ÓPZ 2026-04-07 12/600 2026-04-07 23:30 by Ò»Ö»ºÃ¹û×Ó?
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û