d and f BLOCK ELEMENTS

What is the standard electrode potential (E°) for the reduction of Co²⁺ to Co based on the provided data?

• -0.44 V
• -0.25 V
• -0.28 V
• +0.34 V

Why is the standard electrode potential (E°) for Zn²⁺/Zn significantly more negative than that for Cu²⁺/Cu?

• Zn has a lower atomic mass than Cu
• Cu²⁺ is more hydrated than Zn²⁺
• Zn²⁺ has a higher charge density than Cu²⁺
• The exceptional stability of the d¹⁰ configuration in Zn²⁺ makes reduction difficult

According to the text, which element's E° value for M²⁺/M is influenced by the stability of a half-filled d subshell?

• Cr
• Fe
• Co
• Mn

Based on the general trends mentioned, why is the +2 oxidation state particularly stable for Zinc in its compounds?

• Because Zn has a low atomic number
• Because Zn²⁺ has a half-filled d⁵ electron configuration
• Because Zn²⁺ has a completely filled d¹⁰ electron configuration
• Because Zinc is less reactive than other transition metals

What is the primary factor contributing to the high standard electrode potential (E°) for the Cu²⁺/Cu couple?

• The low ionization energies of Copper
• The stability of the Cu⁺ ion
• The low negative hydration enthalpy of Cu²⁺
• The high negative hydration enthalpy of the Cu²⁺ ion