Chemical Forums

Please login or register.

Login with username, password and session length

Sponsored links

Pages: [1]   Go Down

Author Topic: strongest reducing agent  (Read 423 times)

0 Members and 1 Guest are viewing this topic.

magnus

  • Regular Member
  • ***
  • Mole Snacks: +0/-0
  • Offline Offline
  • Gender: Male
  • Posts: 18
strongest reducing agent
« on: February 06, 2019, 08:33:39 PM »

Given the following reduction interest:
E ° (Ag + / Ag) = + 0.80 V
E ° (Zn2 + / Zn) = - 0.76 V
E ° (Fe3 +, Fe2 +) = + 0, 77 V

the strongest reducing agent is: Fe3+, Zn, Ag, Zn2+

I thought that in order to identify which is the strongest reducing agent, it is sufficient to change the sign of its respective reduction potential to turn it into oxidation potential. The bigger the number, the stronger the reducing agent

It should be the Zn, but which Zn or Zn2 +
Logged

chenbeier

  • Full Member
  • ****
  • Mole Snacks: +41/-13
  • Offline Offline
  • Gender: Male
  • Posts: 398
Re: strongest reducing agent
« Reply #1 on: February 06, 2019, 10:45:40 PM »

All together Zn => Zn2+ +2 e-  -0,76 V
Logged

Enthalpy

  • Chemist
  • Sr. Member
  • *
  • Mole Snacks: +240/-54
  • Offline Offline
  • Posts: 2796
Re: strongest reducing agent
« Reply #2 on: February 06, 2019, 11:10:50 PM »

[...] but which, Zn or Zn2+? [...]

To get reduced, the target gains electrons.
Logged

Babcock_Hall

  • Chemist
  • Sr. Member
  • *
  • Mole Snacks: +233/-16
  • Offline Offline
  • Posts: 3603
Re: strongest reducing agent
« Reply #3 on: February 07, 2019, 06:21:42 AM »

Something that gains (receives) electrons is an oxidant.
Logged

magnus

  • Regular Member
  • ***
  • Mole Snacks: +0/-0
  • Offline Offline
  • Gender: Male
  • Posts: 18
Re: strongest reducing agent
« Reply #4 on: February 10, 2019, 07:55:01 AM »

how come among the possible answers are Fe3 +, Zn, Ag, Zn2 +?
Logged

Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Mole Snacks: +1624/-395
  • Offline Offline
  • Gender: Male
  • Posts: 24804
  • I am known to be occasionally wrong.
    • Chembuddy
Re: strongest reducing agent
« Reply #5 on: February 10, 2019, 08:59:20 AM »

Whoever asks the questions and gives list of answers can put anything they want between answers to select from, even things that completely don't make sense. It is up to someone answering to make the right choice.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info, PZWT_s1

Vidya

  • Full Member
  • ****
  • Mole Snacks: +42/-60
  • Offline Offline
  • Gender: Female
  • Posts: 723
  • Online Chemistry and Organic Chemistry tutor
    • Online Chemistry Tutor
Re: strongest reducing agent
« Reply #6 on: February 11, 2019, 01:41:53 PM »


I thought that in order to identify which is the strongest reducing agent, it is sufficient to change the sign of its respective reduction potential to turn it into oxidation potential. The bigger the number, the stronger the reducing agent

It should be the Zn, but which Zn or Zn2 +
Your approach for this question is right ..one with lowest reduction potential is the best reducing agent.
Zn2+ has electronic configuration of [Ar] 3d10 which is stable and can not be further oxidize.
Zn has only one oxidation number +2 .
Pages: [1]   Go Up
 

Mitch Andre Garcia's Chemical Forums 2003-Present.

Page created in 0.073 seconds with 23 queries.