November 21, 2024, 04:16:28 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Which compound is oxidized and which one reduced in the reaction below?  (Read 3160 times)

0 Members and 1 Guest are viewing this topic.

Offline IBM

  • Regular Member
  • ***
  • Posts: 81
  • Mole Snacks: +0/-7
Which compound is oxidized and which one reduced in the reaction below?
« on: October 04, 2018, 01:20:28 PM »
Which compound is oxidized and which one reduced in the reaction below?
H3PO3 = H3PO4 + PH3
Logged

Offline Babcock_Hall

  • Chemist
  • Sr. Member
  • *
  • Posts: 5704
  • Mole Snacks: +330/-24
Re: Which compound is oxidized and which one reduced in the reaction below?
« Reply #1 on: October 04, 2018, 01:32:52 PM »
Assign oxidation numbers to the atoms.
Logged

Offline IBM

  • Regular Member
  • ***
  • Posts: 81
  • Mole Snacks: +0/-7
Re: Which compound is oxidized and which one reduced in the reaction below?
« Reply #2 on: October 05, 2018, 11:37:25 AM »
Quote from: Babcock_Hall on October 04, 2018, 01:32:52 PM
Assign oxidation numbers to the atoms.
H3PO3 (P =+3) = H3PO4 (P =+5) + PH3 (P= -3)
Logged

Offline Babcock_Hall

  • Chemist
  • Sr. Member
  • *
  • Posts: 5704
  • Mole Snacks: +330/-24
Re: Which compound is oxidized and which one reduced in the reaction below?
« Reply #3 on: October 05, 2018, 12:28:28 PM »
That looks OK to me.
Logged

Offline IBM

  • Regular Member
  • ***
  • Posts: 81
  • Mole Snacks: +0/-7
Re: Which compound is oxidized and which one reduced in the reaction below?
« Reply #4 on: October 06, 2018, 02:30:29 AM »
Quote from: Babcock_Hall on October 05, 2018, 12:28:28 PM
That looks OK to me.
H3PO3 (P =+3) = H3PO4 (P =+5) + PH3 (P= -3)
Could you tell me now which compound is reduced and which compound is oxidized here?
Logged

Offline chenbeier

  • Sr. Member
  • *****
  • Posts: 1337
  • Mole Snacks: +102/-22
  • Gender: Male
Re: Which compound is oxidized and which one reduced in the reaction below?
« Reply #5 on: October 06, 2018, 03:25:49 AM »
Learn definition of oxidation: Oxidation is a release of electrons. What does it mean for the oxidation number? Reduction is a acception of electrons, what does it means for the oxidations number?
Logged

Offline mjc123

  • Chemist
  • Sr. Member
  • *
  • Posts: 2071
  • Mole Snacks: +302/-12
Re: Which compound is oxidized and which one reduced in the reaction below?
« Reply #6 on: October 08, 2018, 04:50:47 AM »
This is not a standard redox reaction, with an oxidising agent and a reducing agent. It is what is called a disproportionation, in which some of the starting material is oxidised and some is reduced. You start with all P(+3), some of it is oxidised to P(+5) and some reduced to P(-3).
By the way, you should try balancing your equation. Not only the numbers of atoms, but also the oxidation numbers, should balance.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links