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Out of Zn and Cu vessel one will be more...

Out of Zn and Cu vessel one will be more suitable to store 1 M HCl?
Given `E_(Zn^(2+)//Zn)^(theta)=-0.76V,E_(Cu^(2+)//Cu)^(theta)=+0.34V.`

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Cu
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If [Zn^(2+)] is maintained at 1.0 M (i) What is the minimum (Cu^(2+)) for which the reaction Zn_((s))+Cu_((aq))^(2+) to Cu_((s))+Zn_((aq))^(2+) is still spontaneous in formward direction. (ii) Does the displacement of Cu_((aq))^(2+)" by "Zn_((s)) go to completion? E_(Zn^(2+)//Zn)^(0)=-0.76V E_(Cu^(2+)//Cu)=0.34V