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The blue colour of copper sulphate solut...

The blue colour of copper sulphate solution is discharged when a rod of zinc is deppid in it.Explain.

Text Solution

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Zinc lies below copper in the electrochemeical series and can therefoe, release electrons to the `Cu^(2+)` ions .As a result Zn is oxidised while`Cu(2+)` ions are reduced.Sinc the concentration of `Cu^(2+)` ion sthe solution decreases the blue zolour of the solution is lsowly idscharged.
`Zn(s)+Cu^(2)(aq)rarrZn^(2+)(aq)+Cu(s)`
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Blue colour of copper sulphate is slowly discharged when an iron rod is dipped into it. Explain this by calculating DeltaG^(@) with the help of the following data : [E_(Cu^(2+)//Cu)^(@) = 0.34 V, E_(Fe^(2+)//Fe)^(@) = -0.44 V and 1 Faraday = 96500 C mol^(-1) ]

Knowledge Check

  • Assertion (A): The colour of copper sulphate solution changes when a piece of zinc is dropped in it Reason (R): Copper is more reactive than zinc.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and Rare true and R is the not the correct explanation of A
    C
    A is true but R is false
    D
    A is true but R is false

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    Why blue colour of copper suphate solution gets dischared when zinc rod is dipped inti ? Given E_(Cu^(2+//Cu))^(@)=0.34V "and" E_(Zn//Zn^(2+))^(@)=0.76 V

    Why blue colour of copper suphate solution gets dischared when zinc rod is dipped inti ? Given E_(Cu^(2+//Cu))^(@)=0.34V "and" E_(Zn//Zn^(2+))^(@)=0.76 V

    Give reasons for the following: Blue colour of copper sulphate solution is destroyed when iron filings are added to it.

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    Identify the type of chemical reaction in the following statement and explain each of them : Blue colour of copper sulphate solution disappears when iron fillings are added to it.

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