Which of the following ions disproportionates in aqueous solution? Write a balanced net ionic eq

Which of the following ions disproportionates in aqueous...

Key Concepts

Disproportionation Reaction

A disproportionation reaction is a type of redox reaction in which a single substance undergoes simultaneous oxidation and reduction, forming two different products in which the element has two distinct oxidation states. This concept is fundamental in understanding how elemental species can be both oxidized and reduced at the same time within the same chemical reaction.

Net Ionic Equation

A net ionic equation is a simplified version of a chemical reaction that shows only the species that undergo a chemical change, excluding spectator ions. This formulation is essential in redox reactions, as it allows for focusing on the actual electron transfer processes and balancing the overall reaction in terms of both mass and charge.

Oxidation States

Oxidation states (or oxidation numbers) are used to indicate the degree of oxidation of an element within a compound or ion. In redox processes, changes in oxidation states signal the gain or loss of electrons, which is key to identifying which species are oxidized, reduced, or undergoing disproportionation.

Redox Balancing

Redox balancing involves ensuring that the number of electrons lost in the oxidation half-reaction is equal to the number of electrons gained in the reduction half-reaction. Mastery of this concept is crucial for accurately writing balanced net ionic equations, particularly when dealing with reactions such as disproportionation where an element is both oxidized and reduced.

Transcript

00:01 Which of the following ion undergo disproportionation in aqua solution so this is the question so we have given some ions that is chromium 3 plus iron f e 3 plus iron copper plus iron and this is c u 2 plus iron so among the following iron we have to tell us about which of the following undergo disproportionation so first of all in the echo solution so first of all we try to understand what is mean by disproportionation so disproportionation reaction so the reaction so i will write first of all disproportionation reaction so this is a reaction the reaction in which molecule the reaction in which molecule atom or ion in which a molecule atom or ion can at the same time at the same time undergo oxidation and reduction undergo oxidation and reduction oxidation and reduction so disproportionation reaction is the type of redox reaction in which atom ion or a molecule undergo oxidation and reduction in the reaction so from the among ions this ion that mean copper plus ion so this iron will undergo disproportionation reaction and the reaction for this so copper plus undergo disproportionation so this will undergo disproportionation so the reaction for this reaction is that is copper positive in aquas so this will undergo copper to plus equest and this is copper that in solid so when we balance we get here too so see that see this this is the oxidation when we find the oxidation state so here this is plus one and this is for plus two and this is zero so see that copper undergo plus one to zero so that mean here a reduction can take place because there is a decrease in oxidation state and here this copper positive copper plus one state to plus two state that mean oxidation take place so this is the this is nothing but reduction and this is our oxidation so this is oxidation because here oxidation number increase so this is the this is the equation for in aqua solution so this is the c u plus equus that will form c u2 plus equus and c u solid so this is our answer for the question now for the above ion we see that c chromium 3 plus ion chromium is already exist in plus 2 plus 3 and plus 6 state so it is very difficult to this is a plus 3 state is already stable state so that's why now f e 3 plus ion is there is a 2 possible state that is f2 plus and fe3 plus and for this is copper 2 plus so it is already copper exist in either plus 1 or plus 2 that is a stable state so it is very difficult to increase its oxidation state so so this is the reason that only copper plus this ion will undergo disproportionation reaction...

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