Question: 1. Consider the reaction: Fe 2 O 3 (s) + 2 Al(s) Al 2 O 3 (s) + 2 Fe(s) Using standard absolute entropies at

1. Consider the reaction: Fe₂O₃(s) + 2Al(s)Al₂O₃(s) + 2Fe(s) Using standard absolute entropies at 298K, calculate the entropy change for the system when 1.56moles of Fe₂O₃(s) react at standard conditions. S_system = J/K

2. In the laboratory, a general chemistry student measured the pH of a 0.313 M aqueous solution of hydrofluoric acid to be 1.840. Use the information she obtained to determine the K_a for this acid. K_a(experiment) =

3. In the laboratory, a general chemistry student measured the pH of a 0.313 M aqueous solution of formic acid, HCOOH to be 2.110. Use the information she obtained to determine the K_a for this acid. K_a(experiment) =

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