oxidation reduction problem important

clicker · 30 Mar 2005, 10:03 PM

You can hide this advertisement by registering.

2H202 ----> 2H20 + 02

which species is the oxidising agent/ reducing agent and why ?

please help
thanx

ishq · 30 Mar 2005, 10:04 PM

This is involving Oxidation Number.

Is this still in the syllabus?

~*HSC 4 life*~ · 30 Mar 2005, 10:07 PM

tip:
the oxidising agent/oxidant is what CAUSES something else to oxidise, it itself reduces
the reducing agent/reductant is what CAUSES somethign else to reduce, it itself oxidises

clicker · 30 Mar 2005, 10:13 PM

therefore is 2H202 THE OXIDISING AGENT?

clicker · 30 Mar 2005, 10:33 PM

in the conversion of h2o2 to 02 how many electrons are lost or gained by the two oxygen atoms

theChemCoach · 30 Mar 2005, 11:16 PM

Quote:

Originally Posted by clicker

2H₂₀2 ----> 2H₂0 + 0₂

which species is the oxidising agent/ reducing agent and why ?

please help
thanx

To identify a redox reaction, we investigate the oxidation states of the individual species involved.

In hydrogen peroxide, the oxidation state of oxygen is:
0 = (+1)(4) + (x)(4)
0 = +4 + 4
0 = 4 + 4x
-4 = 4x
-4/4 = x
-1 = x

therefore the oxidation state of oxygen in hydrogen perioxide is -1, and if we repeat the same process for the oxidation state of oxygen in water, find that its oxidation has changed to -2.
An decrease in oxidation state means that the species was reduced (to get from -1 to -2 it must gain an electron)
If oxygen was reduced, then it is the oxidising agent.

ishq · 1 Apr 2005, 11:51 AM

Exactly! It involves using Oxidation Number.
Is this in the syllabus?

Dreamerish*~ · 1 Apr 2005, 11:56 AM

i thought the oxidation number WAS in the syllabus?

we use it all the time...

tennille · 1 Apr 2005, 11:57 AM

Quote:

Originally Posted by Dreamerish*~

i thought the oxidation number WAS in the syllabus?

we use it all the time...

Yeah, it is.

nit · 1 Apr 2005, 11:58 AM

I'd assume it would be in the syllabus given the electrochem topic in the production of materials module. It's fairly easy to test and involves the application of a few simple rules in any case, so I can't see why you wouldn't be expected to know it.

Dreamerish*~ · 1 Apr 2005, 11:59 AM

99.95 UAI.

ishq · 1 Apr 2005, 12:03 PM

The concept is fairly straightforward.
Yes I know it.
Yes we've done it.
But, after we did it, our teacher said it wasn't specifically in the syllabus.
Possibly wrong.

Thanks guys

30 Mar 2005, 10:03 PM	#1 (permalink)
clicker Junior Member Join Date: Feb 2004 Posts: 30 Last Activity: 21 Apr 2005, 9:12 PM	oxidation reduction problem important You can hide this advertisement by registering. 2H202 ----> 2H20 + 02 which species is the oxidising agent/ reducing agent and why ? please help thanx

30 Mar 2005, 10:04 PM	#2 (permalink)
ishq brown? HSC: 2005 Gender: Female Join Date: Nov 2004 Posts: 949 Last Activity: 5 Jan 2008, 2:22 AM	This is involving Oxidation Number. Is this still in the syllabus? __________________ \| Class of 2005 \|

1 Apr 2005, 11:51 AM	#7 (permalink)
ishq brown? HSC: 2005 Gender: Female Join Date: Nov 2004 Posts: 949 Last Activity: 5 Jan 2008, 2:22 AM	Exactly! It involves using Oxidation Number. Is this in the syllabus? __________________ \| Class of 2005 \|

1 Apr 2005, 11:56 AM	#8 (permalink)
Dreamerish*~ Love Addict - Nakashima HSC: 2005 Gender: Female Join Date: Jan 2005 Posts: 3,737 Last Activity: 21 Jun 2006, 12:36 PM	i thought the oxidation number WAS in the syllabus? we use it all the time... __________________ uai :: 98.20 \| b. pharmacy @ usyd \| no more chemistry students til '07

1 Apr 2005, 11:58 AM	#10 (permalink)
nit Exalted Member HSC: 2004 Gender: Male Location: let's find out. Join Date: Jun 2004 Posts: 839 Last Activity: 1 Oct 2008, 7:31 PM	I'd assume it would be in the syllabus given the electrochem topic in the production of materials module. It's fairly easy to test and involves the application of a few simple rules in any case, so I can't see why you wouldn't be expected to know it. __________________ SGS Class of '04; UAI:99.95 Combined Science Medicine:BSc(Adv)/MBBS Tutoring available for HSC Mathematics 3U/4U; Chemistry; Physics. For more information please visit: http://community.boredofstudies.org/...82#post2049682

30 Mar 2005, 10:07 PM	#3 (permalink)
~HSC 4 life~ Ancient Orator HSC: N/A Gender: Undisclosed Join Date: Aug 2003 Posts: 2,762 Last Activity: 14 Jun 2009, 2:09 PM	tip: the oxidising agent/oxidant is what CAUSES something else to oxidise, it itself reduces the reducing agent/reductant is what CAUSES somethign else to reduce, it itself oxidises

30 Mar 2005, 10:13 PM	#4 (permalink)
clicker Junior Member Join Date: Feb 2004 Posts: 30 Last Activity: 21 Apr 2005, 9:12 PM	therefore is 2H202 THE OXIDISING AGENT?

30 Mar 2005, 10:33 PM	#5 (permalink)
clicker Junior Member Join Date: Feb 2004 Posts: 30 Last Activity: 21 Apr 2005, 9:12 PM	in the conversion of h2o2 to 02 how many electrons are lost or gained by the two oxygen atoms

1 Apr 2005, 11:59 AM	#11 (permalink)
Dreamerish*~ Love Addict - Nakashima HSC: 2005 Gender: Female Join Date: Jan 2005 Posts: 3,737 Last Activity: 21 Jun 2006, 12:36 PM	99.95 UAI. __________________ uai :: 98.20 \| b. pharmacy @ usyd \| no more chemistry students til '07

1 Apr 2005, 12:03 PM	#12 (permalink)
ishq brown? HSC: 2005 Gender: Female Join Date: Nov 2004 Posts: 949 Last Activity: 5 Jan 2008, 2:22 AM	The concept is fairly straightforward. Yes I know it. Yes we've done it. But, after we did it, our teacher said it wasn't specifically in the syllabus. Possibly wrong. Thanks guys __________________ \| Class of 2005 \|

Thread Tools
Show Printable Version Email this Page
Rate This Thread
Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Oxidation/Reduction question	minijumbuk	Production of Materials	11	1 Apr 2008 11:00 AM
i dun get oxidation/reduction in half equations	kooltrainer	Production of Materials	3	17 Oct 2007 1:17 AM
Oxidation & Reduction Sac	omidjavidi	Chemistry	0	25 Apr 2007 10:34 AM
OXidation/reduction of water or oxygen	roosterman	Chemistry	0	7 Nov 2006 5:42 PM
oxidation reduction dot point	melllyy	Production of Materials	3	12 Jul 2006 7:34 AM