Login

Search the forums now!

Welcome, Guest. Please login or register.

May 20, 2024, 04:12:37 pm
Pages: [1]   Go Down

Author Topic: vcaa mc 2008 q20  (Read 635 times)  Share 

0 Members and 1 Guest are viewing this topic.

qshyrn

  • Victorian
  • Forum Leader
  • ****
  • Posts: 535
  • Respect: +2
vcaa mc 2008 q20
« on: November 07, 2010, 07:35:28 pm »
0
can some1 explain why fe2+ is a stronger reductant than br-
Logged

JinXi

  • Victorian
  • Forum Leader
  • ****
  • Posts: 818
  • Respect: +90
  • School: Camberwell High School
  • School Grad Year: 2010
Re: vcaa mc 2008 q20
« Reply #1 on: November 07, 2010, 07:37:49 pm »
0
Cause referring to the electrochemical series, reductants are on the left, increasing in reducing strength(better reductant) as they go down.

Find fe2+ and br- and you'll see that fe2+ is below Br-.


Edit: whoops reductants are on the right (i mean)... too much studying makes me dizzy..
« Last Edit: November 07, 2010, 07:40:30 pm by JinXi »
Logged
Monash B.Aero Eng/Sci Discontinued in Sem2 2012 [2011-2015]

"I will always choose a lazy person to do a difficult job… because, he will find an easy way to do it." ~ Bill Gates
^ SNORLAX, I chooosee You!!!

jasoN-

  • Victorian
  • Forum Leader
  • ****
  • Posts: 661
  • Respect: +7
  • School: WSC
  • School Grad Year: 2010
Re: vcaa mc 2008 q20
« Reply #2 on: November 07, 2010, 07:39:25 pm »
0
reductants are on the right :P, but yes Fe2+ is lower than Br-, hence a stronger reductant
Logged
2009-10: Methods (39) - Specialist Maths (36) - Further Maths (50) - Biology (36) - Chemistry (37) - English Language (36) - ATAR: 97.40
2011-2014: B.Pharm @ Monash University
2015+: Life

qshyrn

  • Victorian
  • Forum Leader
  • ****
  • Posts: 535
  • Respect: +2
Re: vcaa mc 2008 q20
« Reply #3 on: November 07, 2010, 07:42:08 pm »
0
isnt fe 2+ on the left? meaning its an oxidant, whereas Br- is on the right (its a reductatn)  ...
sorry havent studied chem in a  long long time
Logged

JinXi

  • Victorian
  • Forum Leader
  • ****
  • Posts: 818
  • Respect: +90
  • School: Camberwell High School
  • School Grad Year: 2010
Re: vcaa mc 2008 q20
« Reply #4 on: November 07, 2010, 07:43:14 pm »
0
Quote from: qshyrn on November 07, 2010, 07:42:08 pm
isnt fe 2+ on the left? meaning its an oxidant, whereas Br- is on the right (its a reductatn)  ...
sorry havent studied chem in a  long long time

Fe2+ can act as an oxidant or reductant, hence the two equations involving fe2+ in the electrochemical series.
Logged
Monash B.Aero Eng/Sci Discontinued in Sem2 2012 [2011-2015]

"I will always choose a lazy person to do a difficult job… because, he will find an easy way to do it." ~ Bill Gates
^ SNORLAX, I chooosee You!!!

qshyrn

  • Victorian
  • Forum Leader
  • ****
  • Posts: 535
  • Respect: +2
Re: vcaa mc 2008 q20
« Reply #5 on: November 07, 2010, 07:49:40 pm »
0
Quote from: JinXi on November 07, 2010, 07:43:14 pm
Quote from: qshyrn on November 07, 2010, 07:42:08 pm
isnt fe 2+ on the left? meaning its an oxidant, whereas Br- is on the right (its a reductatn)  ...
sorry havent studied chem in a  long long time

Fe2+ can act as an oxidant or reductant, hence the two equations involving fe2+ in the electrochemical series.
oooh ok
Logged

masonnnn

  • Victorian
  • Forum Obsessive
  • ***
  • Posts: 283
  • I'm an art student at heart, can't you tell?
  • Respect: +1
Re: vcaa mc 2008 q20
« Reply #6 on: November 07, 2010, 08:03:57 pm »
0
there's a few things like that(reductant and oxidant), Sn and H20 are as welll. have a general idea of that because while i don't know if they do in exams, in sacs/tests i've come across trick-type questions using them.
Logged
2010: Chem, Lit, Bio, Psych and Further.
201_: Postgraduate Medicine...
Pages: [1]   Go Up