Question

1) Which of the following oxidation-reduction reactions will be spontaneous in the direction written? Select all that apply.

Mg²⁺ (aq) + Be (s) → Mg (s) + Be²⁺ (aq)

Cu²⁺ (aq) + Zn (s) → Cu (s) + Zn²⁺ (aq)

Hg²⁺ (aq) + Cu (s) → Hg (l) + Cu²⁺ (aq)

Pb²⁺ (aq) + Cu (s) → Pb (s) + Cu²⁺ (aq)

Fe²⁺ (aq) + Pb (s) → Fe (s) + Pb²⁺ (aq)

2) What is the value (in V) of E^o_cell for the following reaction?

Sn²⁺ (aq) + Hg (l) → Sn (s) + Hg²⁺ (aq)

3) What values of K (the equilibrium constant) and ΔG are expected for a large positive E^o_cell ?

K less than 1; ΔG negative

K less than 1; ΔG positive

K greater than 1; ΔG negative

These values are not consistently related.

K greater than 1; ΔG positive

4) What is E^o_cell (in V) for a redox reaction where one electron is transferred with an equilibrium constant (K) of 9.88 x 10¹²?

5) What is ΔG^o (in kJ/mol) for a redox reaction where two electrons are transferred with E^o_cell = -0.338 V?

Answer 1