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One of the nicest application of reducti...

One of the nicest application of reduction potential is the prediction of the products of reaction involving elements having several oxidation staes. Consider the reaction of iodine with permanganate in acid sollution. The pertinent diagram is shown below

To the acidic permanganate solution, iodide solution is added drop wise the products of reaction are

A

`I_(3)^(-)` and `MnO_(2)`

B

`I_(3)^(-)` and `MnO_(4)^(2-)`

C

`I_(2)` and `MnO_(2)`

D

`I_(2)` and `Mn^(2+)`

Text Solution

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The correct Answer is:
A
The products of the reaction must be stable in presence at `KMnO_(4), Mn^(+2)` is not formed as `KMnO_(4)` oxidize it to `MnO_(2)` and `I_(2)` is also not formed only `IO_(3)^(-)` is formed.
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One of the nicest application of reduction potential is the prediction of the products of reaction involving elements having several oxidation staes. Consider the reaction of iodine with permanganate in acid sollution. The pertinent diagram is shown below What are species which are unstable towards disproportion

One of the nicest application of reduction potential is the prediction of the products of reaction involving elements having several oxidation staes. Consider the reaction of iodine with permanganate in acid sollution. The pertinent diagram is shown below When the reaction between I^(-) and MnO_(4)^(-) carried out with iodide in excess, then the productes of the reaction are

The following reactions occur in aqueous solution .Predict the products and identify the acids and bases (and their conjugate species ) in the reaction of NH_(3) with CH_(3)COOH

Determining the directiom of spontaneity from electrode pot Na^(+)(aq.) + e^(-) rarr Na(s) E^(@) = -2.71 V entials : Predict from Table 3.1, whether Pb^(2+)(aq.) can oxidize Al(s) or Cu(s) under standard conditions. Calculate E^(ɵ) for each reaction at 25^(@)C . Strategy: To predict whether a redox reaction is spontaneous, remember that an oxidizing agent can oxidize any reducing agent that lies below it in the table but can't oxidize one that lies above it. Alternatively, write the expected reaction. Find the oxidizing agents in the equations, one is on the left side and the other on the right side. Locate these oxidizing agents in a table of electrode potentials (the oxidizing agent is on the left side of the reduction half-reaction). The stronger oxidizing agent is the one involved in the half-reaction with the more positive standard electrode potential.

Read the passage given below and answer the following questions: Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination, most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives, this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an addition compound, a Schiff's base (RCH= NCH_(2)R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines. Similar reactions may occur when the carbonyl compound employed is a ketone. (source: Emerson, W. S. (2011). The Preparation of Amines by Reductive Alkylation. Organic Reactions, 174–255. doi:10.1002/0471264180.or004.03 ) Ethanal on reaction with ammonia forms an imine (X) which on reaction with nascent hydrogen gives (Y). Identify ‘X’ and ‘Y’.

Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid? Write the ionic equation for the reaction. OR Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) an iodide (ii) H_(2)S .

(i) Take about 3 mL, of ethanol is a rest tube and warm it gently in a water bath. (ii) Add a 5% solution of alkaline potassium permanganate drop by drop to the solution. (iii) What happens to the colour of KMnO_(4) added initially and then in excess? Give reason. Name the product of this reaction.

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