Which of the following metals will not react | vedclass

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(D) The correct answer is $(D)$.$A$ metal can displace another metal from its salt solution if it is more reactive,meaning it has a lower (more negati

Vedclass · Accepted Answer

$Ag$

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(D) The correct answer is $(D)$.$A$ metal can displace another metal from its salt solution if it is more reactive,meaning it has a lower (more negative) standard reduction potential than the metal in the salt.The standard reduction potentials $(E^o)$ are:$Mg^{2+} + 2e^- 	o Mg$ $(E^o = -2.37 \ V)$$Zn^{2+} + 2e^- 	o Zn$ $(E^o = -0.76 \ V)$$Fe^{2+} + 2e^- 	o Fe$ $(E^o = -0.44 \ V)$$Cu^{2+} + 2e^- 	o Cu$ $(E^o = +0.34 \ V)$$Ag^+ + e^- 	o Ag$ $(E^o = +0.80 \ V)$Since $Mg$,$Zn$,and $Fe$ have lower reduction potentials than $Cu$,they will displace $Cu$ from $CuSO_4$ solution.$Ag$ has a higher reduction potential $(+0.80 \ V)$ than $Cu$ $(+0.34 \ V)$,so it cannot displace $Cu$ from its solution.

Which of the following metals will not react with a solution of $CuSO_4$?

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