The standard potential at $25℃$ for the following half-reactions are given against them ${Zn}^{2 +} + 2e^{-} \rightarrow Zn,\ \ E{^\circ} = - 0.762\ V$ ${Mg}^{2 +} + 2e^{-} \rightarrow Mg,\ E{^\circ} = - 2.37\ V$ When zinc dust is added to the solution of ${MgCl}_{2},$

Question

Dr. Abubacker · Accepted Answer

(d)
$Zn + {MgCl}_{2} \rightarrow$ no reaction
This type of reaction does not occur because
${Mg}^{2 +}E^{{^\circ}} = - 2.37\ V,\$while$\ \ {Zn}^{2 +}\ E^{{^\circ}} = - 0.76\ V$

Q. The standard potential at $25℃$ for the following half-reactions are given against them ${Zn}^{2 +} + 2e^{-} \rightarrow Zn,\ \ E{^\circ} = - 0.762\ V$ ${Mg}^{2 +} + 2e^{-} \rightarrow Mg,\ E{^\circ} = - 2.37\ V$ When zinc dust is added to the solution of ${MgCl}_{2},$

Explanation

Reviewed by Dr. Abubacker

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