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1. Complete and balance the following equations.

a. ammonia plus perchloric acid

b. Cd2+(aq) + NH3(aq) {NH3 is in excess}

c. As2O3(s) + NO3(aq) H3AsO4(aq) + NO(g)

d. Bi(OH)3(s) + Sn(OH)3 (aq) Bi(s) + Sn(OH)62– (aq)



2. Consider the reaction between solid barium chloride and aqueous sodium sulfate.

a. Write the balanced reaction.

b. Find Ho for the reaction in units of kJ.

c. Find So for the reaction in units of J/K.

d. Find Go for the reaction at 25 oC in units of kJ.

e. Find Go for the reaction at 75 oC in units of kJ.

f. Is the reaction spontaneous or nonspontaneous at each temperature? Why?



3. Barium carbonate has a molar solubility of 5.7×10–5 M at 25 °C and 6.1×10–5 M at 85 °C. Find Ksp at each temperature and Ho and So for the solubilization reaction.



4. Consider the cell: Li(s)|Li+(aq)||Fe2+(aq)|Fe(s)

a. What is the balanced oxidation half-reaction?

b. What is the balanced reduction half-reaction?

c. What is the balanced net reaction?

d. What is the standard potential for the cell?

e. Is the reaction spontaneous or nonspontaneous? Why?