Home   Forum   Help Search Calendar Links Login Register   **
Welcome, Guest. Please login or register.
Did you miss your activation email?
May 25, 2012, 11:44:23 AM

Login with username, password and session length
Program
EduWebTVLatih TubiLINUSManaging Challenging SchoolsGerakan Memperkasakan SekolahLDPICTL SMICTL SRMalaysian Grid for Learning (MyGfL)ProtimPPSMISIP
Recent
FALIZAH LAHIMIN
by Falizah
[Today at 11:36:49 AM]
Selamat Bertugas di Pejab...
by Shirley Siew Lei Hoon
[Today at 11:07:06 AM]
Cuti sekolah
by Ting Pin An
[Today at 10:11:32 AM]
Peperiksaan Pertengahan T...
by Cheong Wooi Chun
[Today at 07:56:42 AM]
introduce myself
by ruslizasalleh
[Yesterday at 11:56:50 PM]
URUSAN PEMANGKUAN PEGAWAI...
by Irin ak Banying
[Yesterday at 10:23:08 PM]
WARAN..WARAN..WARAN
by Dharma Harun
[Yesterday at 08:34:38 PM]
TIME BASED
by Goh Yong Juan
[Yesterday at 05:51:30 PM]
PSKPP peringkat Negeri Sa...
by Robert Anak Adam
[Yesterday at 11:53:44 AM]
Some tips for answering E...
by Mary Jane Telma Teo
[Yesterday at 09:14:15 AM]
 

engkabang.net > Forum > Sijil Pelajaran Malaysia > 4541 Chemistry (Moderator: Jong Kah Yin) > Electrolysis overall equation?
Pages: [1]   Go Down
« previous next »
  Print  
Author Topic: Electrolysis overall equation?  (Read 525 times)
0 Members and 1 Guest are viewing this topic.
Lim Tze Khai
SMK RIAM, MIRI
Teacher
Full Member
*

Fame: 6
Offline Offline

Gender: Male
Posts: 121
« on: May 05, 2009, 10:15:41 AM »
Electrolysis of molten PbBr2 with carbon electrode

   Anode: 2Br- --> Br2 +2e
   Cathode: Pb2+ + 2e --> Pb
   Overall:
Option 1: Pb2+ + 2Br- --> Pb + Br2

or

Option 2: PbBr2 --> Pb + Br2
   
Which is your answer???
Logged
LIM TZE KHAI
SMK RIAM, MIRI
Ting Tin Chung
SMK Bandar Bintulu
Teacher
Senior Member
*

Fame: 3
Offline Offline

Gender: Male
Posts: 243


Be your self...... 相信自己...一定能!!
« Reply #1 on: May 05, 2009, 10:21:05 AM »
Quote from: Lim Tze Khai on May 05, 2009, 10:15:41 AM
Electrolysis of molten PbBr2 with carbon electrode

   Anode: 2Br- --> Br2 +2e
   Cathode: Pb2+ + 2e --> Pb
   Overall:
Option 1: Pb2+ + 2Br- --> Pb + Br2

or

Option 2: PbBr2 --> Pb + Br2
   
Which is your answer???

Normally when we talk about overall equation, it's involve the ions in the equation....
My answer is refer to option 1.... never seen the equation in option 2....
If i'm wrong, please let me know... Wink
Logged
Ting Tin Chung
Guru Data
SMK Bandar Bintulu 民都鲁市镇中学
Km 8, Jln Tun Hussein Onn,
97008 Bintulu
Lim Tze Khai
SMK RIAM, MIRI
Teacher
Full Member
*

Fame: 6
Offline Offline

Gender: Male
Posts: 121
« Reply #2 on: May 05, 2009, 10:29:13 AM »
Correction!!!!!

Electrolysis of molten PbBr2 with carbon electrode

   Anode: 2Br- --> Br2 +2e
   Cathode: Pb2+ + 2e --> Pb
   Overall:
Option 1: Pb2+ + 2Br- --> Pb + Br2

or

Option 2: PbBr2 --> Pb + Br2
   
Which is your answer???
Logged
Ting Tin Chung
SMK Bandar Bintulu
Teacher
Senior Member
*

Fame: 3
Offline Offline

Gender: Male
Posts: 243


Be your self...... 相信自己...一定能!!
« Reply #3 on: May 05, 2009, 12:21:14 PM »
i still prefer option 1.....
« Last Edit: May 10, 2009, 09:10:36 PM by Ting Tin Chung » Logged
Liew Hui Lee
SMK Bandar Samariang
Teacher
Novice Member
*

Fame: 0
Offline Offline

Gender: Female
Posts: 28
« Reply #4 on: May 10, 2009, 08:38:45 PM »
Only Option 1 is accepted.  Normally, during writing overall equation, we combine both the half-equation by cancel out the electrons.  If both half-equation have unequal number of electrons, we must make their number of electrons equal by multifly with a coefficient...
Logged
Liew Hui Lee
SMK Bandar Samariang
Tay Guan Piang
SMK St. Augustine
Teacher
Veteran Member
*

Fame: 12
Offline Offline

Gender: Male
Posts: 730


Be Smart :)
« Reply #5 on: May 16, 2009, 09:00:46 PM »
Same goes for me, option 1 is my choice.
Logged
SMK St. Augustine
Elegant & Charming
Choo Yih Teen
SMK Chung Hua Sibu
Teacher
Full Member
*

Fame: 2
Offline Offline

Gender: Female
Posts: 134


Sibu
« Reply #6 on: May 20, 2009, 01:57:16 PM »
i usually teach my class option 1, which is easier to explain...

anyway, i manage to find this web page, http://www.gcsescience.com/ex5.htm which written option 2 as overall reaction.

what do you think?  Wink
Logged
Choo Yih Teen
SMK Chung Hua Sibu
Pages: [1]   Go Up
  Print  
« previous next »
 
Jump to:  

Search
Stats
PIPPBahagian Pembangunan Kurikulume-Paymente-Hasil
Powered by MySQL Powered by PHP Powered by SMF 1.1.16 | SMF © 2011, Simple Machines | Sitemap Valid XHTML 1.0! Valid CSS!
Page created in 7.697 seconds with 26 queries.