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Write Nernst equation for the reaction :...

Write Nernst equation for the reaction :
`2Cr(s)+3Fe^(2+)(aq)to2Cr^(3+)(aq)+3Fe(s)`

Text Solution

Verified by Experts

`{:(2Cr(s)to2Cr^(3+)(aq)+6e),(3Fe^(2+)(aq)+6eto3Fe(s)),(_),(2Cr(s)+3Fe^(2+)(aq)to2Cr^(3+)(aq)+3Fe(s)),(_):}`
Nernst equation is `E_("cell")=E_("cell")^(@)+(0.0591)/(6)log""([Fe^(2+)]^(3))/([Cr^(3+)]^(2))`
`=(n=6)`
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Write Nernst equation for the reaction (i) 2Cr(s)+3Cd^(+ +)(aq)to2Cr^(3+)(aq)+3Cd(s) (ii) 2Cr+3Fe^(+ +)to2Cr^(3+)+3Fe

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Knowledge Check

  • The standard free energy change (in J) for the reaction 3Fe^(2+)(aq)+2Cr(s)to2Cr^(3)+3Fe(s) given E_(Fe^(2+)//Fe)^(0)=-0.454V and E_(Cr^(3+)//Cr)^(0)=-0.74V is (F=96500C)

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  • What will be standard cell potential of galvanic cell with the following reaction? 2Cr(s) + 3Cd^(2+)(aq) to 2Cr^(3+)(aq) + 3Cd(s) [Given: E_(Cr^(3+)//Cr)^(@) = -0.74 V and E_(Cu^(2+)//Cu)^(@) = -0.4 V

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