Copper belongs to the noble metals (a metal that resists corrosion and oxidation
when exposed to air). These stand in the row after hydrogen and are not affected by non-
oxidizing acids, which is why it is not dissolved by hydrochloric acid.Means Cu++ + 2e- = Cu Eº
= 0.34 volt H+ + e- + 1/2H2 = 0 V So from Eo value we can see Cu can\'t displace H from Hcl .
However nitric acid is a strong oxidizing acid and therefore oxidises copper. Nitric acid will
oxidise both zinc and copper. Where in reaction with Hcl, Zn will displace H from Hcl because
of negative electrode potential
Solution
Copper belongs to the noble metals (a metal that resists corrosion and oxidation
when exposed to air). These stand in the row after hydrogen and are not affected by non-
oxidizing acids, which is why it is not dissolved by hydrochloric acid.Means Cu++ + 2e- = Cu Eº
= 0.34 volt H+ + e- + 1/2H2 = 0 V So from Eo value we can see Cu can\'t displace H from Hcl .
However nitric acid is a strong oxidizing acid and therefore oxidises copper. Nitric acid will
oxidise both zinc and copper. Where in reaction with Hcl, Zn will displace H from Hcl because
of negative electrode potential.
Copper belongs to the noble metals (a metal that .pdf
1. Copper belongs to the noble metals (a metal that resists corrosion and oxidation
when exposed to air). These stand in the row after hydrogen and are not affected by non-
oxidizing acids, which is why it is not dissolved by hydrochloric acid.Means Cu++ + 2e- = Cu Eº
= 0.34 volt H+ + e- + 1/2H2 = 0 V So from Eo value we can see Cu can't displace H from Hcl .
However nitric acid is a strong oxidizing acid and therefore oxidises copper. Nitric acid will
oxidise both zinc and copper. Where in reaction with Hcl, Zn will displace H from Hcl because
of negative electrode potential
Solution
Copper belongs to the noble metals (a metal that resists corrosion and oxidation
when exposed to air). These stand in the row after hydrogen and are not affected by non-
oxidizing acids, which is why it is not dissolved by hydrochloric acid.Means Cu++ + 2e- = Cu Eº
= 0.34 volt H+ + e- + 1/2H2 = 0 V So from Eo value we can see Cu can't displace H from Hcl .
However nitric acid is a strong oxidizing acid and therefore oxidises copper. Nitric acid will
oxidise both zinc and copper. Where in reaction with Hcl, Zn will displace H from Hcl because
of negative electrode potential
