Assuming standard conditions, answer the following questions. (Use the table of
ID: 926035 • Letter: A
Question
Assuming standard conditions, answer the following questions.
(Use the table of Standard Reduction Potentials for common Half-reactions from your text.
If hydrogen is one of the reagents, assume acidic solution.)
Is Cr metal capable of reducing Fe2+(aq)?
Is Cr3+(aq) capable of oxidizing Fe2+(aq) to Fe3+(aq)?
Is Sn metal capable of reducing Fe3+(aq) to Fe2+(aq)?
Is VO2+(aq) capable of oxidizing Fe2+(aq)?
Is Ag+(aq) capable of oxidizing H2(g)?
Is Fe2+(aq) capable of reducing Cr3+(aq) to Cr metal?
Can someone give me a detailed answer, I'm trying to understand it but It's a little confusing. Thanks
Explanation / Answer
For cations the activation series is
Li+ , K+ , Na+ , Ca 2+ , Mg 2+ , Al 3+ , Zn 2+ ,Cr3+, Fe2+ , Ni 2+ ,Sn2+, Pb2+ ,H+ , Cu2+ ,Fe3+ , Hg2+ , Ag + , Au3+
As we from left to right the reduction potential valves are increases.
An oxidising agent is having higher reduction potential & A reducing agent is having lower reduction potential.
Remember that,An oxidising agent will oxidise any reducing agent .A reducing agent will reduce any oxidising agent.Also lower reduction potential metal displaces higher reduction potential value metal.
(1) As the potential of Cr is less than that of Fe it reduces Fe2+
(2) Cr3+(aq) is capable of oxidizing Fe2+(aq) to Fe3+(aq)
(3) Sn metal capable of reducing Fe3+(aq) to Fe2+(aq)
(4) the standard potential of VO2+ is lower than that of Fe2+,it cannot oxidizing Fe2+(aq)
(5) Ag+(aq) is not capable of oxidizing H2(g)
(6) Fe2+(aq) is not capable of reducing Cr3+(aq) to Cr metal