Question

1 a. The reaction between aluminum and iodine has this overall electrochemical cell: Al(s)| Al3+(aq)|| I2(aq),I-1(aq)|...

1

a. The reaction between aluminum and iodine has this overall electrochemical cell: Al(s)| Al3+(aq)|| I2(aq),I-1(aq)| Pt(s) Balance each of the two half-cell reactions and put them together to obtain the balanced overall reaction. Identify the oxidation and reduction half-cells, as well as the cathode and anode.

b. Refer to the attached table of standard reduction potentials. Determine the standard potential (EO) for the overall reaction. Show all units. Is the reaction spontaneous? How can you tell?

c. Write the thermodynamic equilibrium constant expression for the balanced overall reaction in 1a.

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a. CO2can be formed by: CaCO3(s)+ 2H+1(aq)⇌Ca+2(aq)+ H2O(liq)+CO2(g)Write the thermodynamic equilibrium constant expression.

b. K = 7.10 × 10+9at 1 atm and 298K. Find Goin kJ. Show all units and conversion factors. Use significant figures.

c. Find the value of Q when the Ca+2 and H+1 concentrations are both 0.115M and the partial pressure of CO2 is 0.875atm. Then, use Q to find Go. Show all units and conversion factors. Use significant figures.

d. So= − 137.7J/K for the CO2 reaction above. Use Go to find Ho in kJ. Show all units and conversion factors. Use significant figures.

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