原帖由 L.K. 於 13-4-2008 13:54 發表 http://www.nakuz.com/bbs/images/common/back.gif
用DATA LOGER最好....
data loger 都係要同pH meter 混合泥用...
原帖由 L.K. 於 13-4-2008 05:54 發表 http://www1.nakuz.com/bbs/images/common/back.gif
用DATA LOGER最好....
data-logger 係部record data 的野
你需要另外整d instruments 去做, 都唔平
但只用pH meter 平好多 lol
原帖由 Zend 於 13-4-2008 13:46 發表 http://www1.nakuz.com/bbs/images/common/back.gif
1. OA 係過程中會有Drop/decrease in O.S
2. catalyst 係speed up/slow down 一個chemical reaction, 而佢at the end of reaction 係無chemically changed
我會用pH meter, 又快又方便
催化劑可slow down個反應<-----而家先知~_~
突然做做下題目又有野要問,唔想開新帖人
我想問下假如催化劑催化果個係可逆反應,咁樣係咪會同時speed up/slow down個正反應同逆反應?
原帖由 frankie172002 於 13-4-2008 15:17 發表 http://www.nakuz.com/bbs/images/common/back.gif
催化劑可slow down個反應
錯![]
Catalyst 分2種,positive 同 negative...
positive speed up, vice versa
唔係1隻catalyst同時speed up/slow down[]
原帖由 piyopiyo 於 13-4-2008 15:23 發表 http://www1.nakuz.com/bbs/images/common/back.gif
錯![]
Catalyst 分2種,positive 同 negative...
positive speed up, vice versa
唔係1隻catalyst同時speed up/slow down[]
catalyst 係speed up/slow down 一個chemical reaction, 而佢at the end of reaction 係無chemically changed
樓上有人咁講既~_~
原帖由 frankie172002 於 13-4-2008 15:30 發表 http://www.nakuz.com/bbs/images/common/back.gif
catalyst 係speed up/slow down 一個chemical reaction, 而佢at the end of reaction 係無chemically changed
樓上有人咁講既~_~
catalyst係用泥 speed up 或者 slow down 個reaction...
當個catalyst係個reaction係 positive catalyst,佢就只會 speed up...vice versa
唔係同時speed up 同埋 slow down []
原帖由 piyopiyo 於 13-4-2008 15:32 發表 http://www.nakuz.com/bbs/images/common/back.gif
catalyst係用泥 speed up 或者 slow down 個reaction...
當個catalyst係個reaction係 positive catalyst,佢就只會 speed up...vice versa
唔係同時speed up 同埋 slow down []
He is thinking about this
For a reversible catalysed reaction, will the cat. catalyse the backward reaction (= slow down forward reaction)?
This is okay, bacause, the net effect can still be to speed up the reaction.
Enzymes are an example.
原帖由 Puppet 於 13-4-2008 15:46 發表 http://www1.nakuz.com/bbs/images/common/back.gif
He is thinking about this
For a reversible catalysed reaction, will the cat. catalyse the backward reaction (= slow down forward reaction)?
This is okay, bacause, the net effect can still be to...
得你明白我個問題[],多謝你既解答
both forward and backward reactions speed up /slow down
catalysts can be classifiied in terms of its use.but in most cases, positive catalysts are used to "increase the yield" in industrial view...
原帖由 frankie172002 於 12-4-2008 22:19 發表 http://www.nakuz.com/bbs/images/common/back.gif
1.點解我本書寫係用氧化劑既?[]
本書既例子
丙-1-醇++H2O--->丙-1,2二醇
同埋我本書冇提過你講既野,我剩係做pp見過,會考都要考埋?
2.通用指示劑由淺綠色變成藍色
有咩提示係當溶液係鹼性,指 ...
答番樓上中文問ge問題
1.你本書個例子係由烯烴變成有2個相同官能基(羥基)ge醇
而唔係1個官能基ge醇
(正向)催化劑對可逆反應ge影響要係AL化學先考......
話說(正向)催化劑唔會影響可逆反應ge平衡位置(即兩面ge產量不變)