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CE 347 – Spring 2021 Homework #2 Due February 19, 11:59 PM Be sure to show all work. 1) (5 points) Write the equilibrium constant equations for the following reactions (hint: make sure each chemical equation is balanced!): a) CO2 + H2O ↔ H+ + HCO3b) Al2(SO4)3 ↔ Al3+ + SO422) (5 points) Acid mine drainage occurs when pyrite (FeS2; also known as Fool’s Gold) reacts with air and water. Balance the following equation describing this reaction and find the theoretical oxygen demand (in mg/L of O2) needed to completely oxidize 25 mg/L of pyrite. 𝐹𝑒𝑆2 + 𝑂2 + 𝐻2 𝑂 β†’ 𝐹𝑒𝑆𝑂4 + 𝐻2 𝑆𝑂4 3) (10 points) Determine the pH of the following aqueous solutions: a) 10-5.8 mol/L hydrogen ions (H+) b) 3Γ—10-4 mg/L hydroxide ions (OH-) 4) (10 points) Suppose 25 mg of potassium hydroxide (KOH, a strong base) is dissolved in 500 mL of pure water. What is the pOH of the

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