Following ions are given :

Cr^{2+},Cu^{2+},Cu^{+},Fe^{2+},Fe^{3+},Mn^{3+}

Identify the ion which is

(i) a strong reducing agent.

(ii) unstable in aqueous solution.

(iii) a strong oxiding agent.

Give suitable reason in each.

 

 
 
 
 
 

Answers (1)
S safeer

(i) Cr2+ is a strong reducing agent, because the stable state of chromium is +3 due to configuration.

(ii) Cu+(aq) is unstable in aqueous solution due to more negative \Delta_{hyd} H^{0} of Cu2+(aq) than Cu+(aq)

 (iii) Mn3+ is a strong oxidising agent, because the most stable state of manganese is +2 due to half filled configuration i.e 3d5

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