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Redox Reactions — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions2 Marks
Question
$\mathrm{Br}_2+2 \mathrm{Cl}^{-} \rightarrow \mathrm{Cl}_2+2 \mathrm{Br}^{-}$, will this reaction take place or not?
$\text{E}^0_\frac{\text{Br}_2}{\text{Br}^-}=+1.09\text{V}$
$\text{E}^0_\frac{\text{Cl}_2}{\text{Cl}^-}=+1.36\text{V}$
✓

Answer

$\mathrm{E}_{\mathrm{cell}}^0=\mathrm{E}_{\frac{\mathrm{Br}_2}{\mathrm{Br}}}^0-\mathrm{E}_{\frac{\mathrm{Cl}_2}{\mathrm{ct}}}^0$
$=1.09 \mathrm{~V}-1.36$
$=-0.27 \mathrm{~V}$
Since $E^{\circ}$ cell is -ve, reaction will not take place.

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