Friday, October 12, 2007

Chemistry Question - Redox

Halo, Try this one...

Q) A drop of solution S turns acidified orange potassium dichromate (VI) to green chromium (III) ions. What must solution S contain?

A) An acid
B) An oxidizing agent
C) A reducing agent
D) A substance that can be oxidized

Come on students....

Rgds
Sean
SimpleChemConcepts
at

5 comments:

  1. AnonymousOctober 12, 2007 at 9:30 AM

    Is it C?

    ReplyDelete
  2. zhengningOctober 12, 2007 at 5:17 PM

    Orange potassium dichromate (VI) is reduced to green chromium (III) ions, so it's an oxidizing agent.

    Hence, the solution must be a reducing agent...

    C?

    ReplyDelete
  3. AnonymousOctober 12, 2007 at 6:52 PM

    I think the answer is C.. by the way, can I have the link that was removed in the comments in the post on Fats and Terylene?

    ReplyDelete
  4. lijun(:October 15, 2007 at 9:46 AM

    i think its C too.

    S reduces the orange potassium dichromate (VI) to green potassium dichromate (III),
    hence, S must be a reducing agent.

    ReplyDelete
  5. Sean ChuaOctober 15, 2007 at 9:48 AM

    Well Done both.

    Answers is indeed C. Some students tends to have problems when it comes to Reducing and Oxidizing Agents.

    ReplyDelete