Learning in F.4

Author Message   20001151 Username: 20001151 Registered: 04-2003 Posted on Thursday, July 10, 2003 - 10:25 am:    Dear Mr. Chio U Kim, I am a student from S.3E. What we will learn most in F.4 Chemistry? Student Ho Man Chun. 10-07-2003.   Chio U Kim Username: cuk Registered: 04-2003 Posted on Thursday, July 10, 2003 - 07:34 pm:    Dear 20001151, You may download the scheme of work for S4 Chemistry from the following link. http://www.ilc.edu.hk/subjectweb/chemweb/index.htm   20001151 Username: 20001151 Registered: 04-2003 Posted on Friday, July 11, 2003 - 10:07 am:    Dear Mr. Chio, Thank you very much.   祥 Username: 991934 Registered: 04-2003 Posted on Friday, July 18, 2003 - 05:11 pm:    趙 sir, 我想問咩叫Contract Process???   祥 Username: 991934 Registered: 04-2003 Posted on Friday, July 18, 2003 - 05:11 pm:    趙sir, sorry,係 Contact Process   Chio U Kim Username: cuk Registered: 04-2003 Posted on Saturday, July 19, 2003 - 11:08 am:    Contact Process is one of the industrial processes for the production of sulphuric acid. Contact process will be discussed in S5.   祥 Username: 991934 Registered: 04-2003 Posted on Saturday, July 19, 2003 - 05:12 pm:    趙sir, 1.我想問點樣寫呢題equation: Na(s)+KCl(aq)--> 以我所知呢度唔會發生Displacement reaction,但係Na 會同aqueous 入面既water react,我想知應該點寫,thz.. 2.我想知點解呢題equation係唔得o既? Cu2+(aq)+2Ag(s)-->Cu(s)+2Ag+(aq) 個解釋係咪話Cu(s) is a stronger reudcing agent than Ag(s),Cu cannot be formed.但係我就係唔係好明,我唔明就係幾時個redox係得,幾時會唔得,thz...   Chio U Kim Username: cuk Registered: 04-2003 Posted on Sunday, July 20, 2003 - 09:39 am:    1. 2Na(s) + 2H2O(l) ® 2NaOH(aq) + H2(g) 2. Cu, but not Cu2+, is a stronger reducing agent than Ag (or Cu loses electrons more readily than Ag). Therefore, Cu + 2Ag+ ® is favourable and the reversed process is not favourable Cu2+ + 2Ag ® no reaction