d and f BLOCK ELEMENTS

What is the consequence of Cu2+ having a d9 electronic configuration on its hydration process?

• It makes hydration impossible.
• It results in a perfectly spherical ion with no crystal field effects.
• It only affects the color of the solution.
• It leads to a specific crystal field stabilization energy that influences the overall hydration enthalpy.

For a metal M, if the sum of its ΔaH°, IE1, and IE2 is very high, what is the likely impact on its E°(M2+/M) value, assuming ΔhydH° does not change drastically?

• The E°(M2+/M) value will tend to be more negative (less positive).
• The E°(M2+/M) value will be unaffected.
• The E°(M2+/M) value will become zero.
• The E°(M2+/M) value will tend to be less negative (more positive).

Which of the following electronic configurations for a M2+ ion would likely contribute to a more negative E°(M2+/M) value than expected?

• d4
• d6
• d8
• d10

Why is the comparison between observed and calculated E°(M2+/M) values useful?

• It is only useful for elements with positive E° values.
• It proves that thermochemical parameters are always accurate.
• It is not useful as calculations are always wrong.
• It helps identify the relative contributions and potential shortcomings of the thermochemical parameters used in the calculation.

What is the expected E°(M2+/M) trend for the elements Sc, Ti, V, Cr, Mn?

• Generally becoming more negative (less positive) from Sc to Mn.
• Remaining constant from Sc to Mn.
• Fluctuating randomly from Sc to Mn.
• Generally becoming less negative (more positive) from Sc to Mn.