23 Nov 09, 20:47
Mr Kwok: Hi Zhong Sheng, i hope you found the answer. It is also as good as saying it is a dative bond.22 Nov 09, 18:18
zhong sheng: what is coordinate bond?20 Nov 09, 11:01
Mr Kwok: Hi Samm, it is just just an electrophile (species that is electron deficient) and it seeks out for electrons. alkene's pi electrons are exposed hence susceptible to attacks frm electrophiles.20 Nov 09, 11:01
Mr Kwok: Hi Samm, it is just just an electrophile (species that is electron deficient) and it seeks out for electrons. alkene's pi electrons are exposed hence susceptible to attacks frm electrophiles.11 Nov 09, 07:33
samm: ermm how to understand electrophilic addition mechanism?30 Oct 09, 00:31
brenda: hi sir, instead of condensation if we write esterification is it the same?21 Sep 09, 00:20
Mr Kwok: for Tollen's reagent, it is best to put Ag+ and NH3. 
thanks for dropping a note here yimin! 21 Sep 09, 00:19
Mr Kwok: For Fehling's solution it has to be alkaline copper (II) tiartrate. Sometimes, we do accept Cu2+, OH-.19 Sep 09, 10:27
yimin: Same goes for Fehling's solution. Can I simply write "Cu 2+ ions" or do I have to put the reagents to get copper(II) tartrate?19 Sep 09, 10:26
yimin: "silver nitrate(aq) and ammonia"?19 Sep 09, 10:26
yimin: Hi Sir, for the Tollen's reagent can I write "silver diammine" or do I have to write "5 Sep 09, 22:15
KOfi: I am 29YR old man who wants to be a medical doctor but is having problems with basic stoichimetry and equilicrium> I was wondering if you can help cure me. lol1 Sep 09, 14:04
Mr Kwok: Hi Brenda! Thank you so much!1 Sep 09, 12:13
brenda: hsppy teacher's day sir!31 Aug 09, 22:13
Mr Kwok: Hi Yimin, thank you for your well-wishes. LOL. Well, we are keeping our fingers crossed still. 31 Aug 09, 13:59
yimin: hi sir, happy teachers' day. i hope i did well for chem. haha16 Aug 09, 11:00
Mr Kwok: Hi Brenda, usually we take the T.M has a coordination number 6 (more common) or 4.16 Aug 09, 10:59
Mr Kwok: Hi Zhong Sheng, the basic reason is that P does not like to form a triple bond becos it p orbital is large and overlapping is not effective.16 Aug 09, 10:59
Mr Kwok: Shayne both ion-dipole and h-bonding kind of coexist.. but i dun think it is relevant. We just need to know h-bonding molecules form ion-dipole with ions so that the ions can dissolve.16 Aug 09, 02:01
brenda: hi sir, is there a way to derive what kind of complexes can be formed when ligands have dative bonds with transition elements?