Use the Henderson-Hasselbalch equation to find the concentra…

Use the Henderson-Hasselbalch equation to find the concentration (in mM) of potassium acetate in a buffer containing 150 mM acetic acid if the pH is 4.98.  Ka = 1.8 x 10-5. If no work is submitted for this problem, there will be a penalty of 50%. This means a correct answer for a 5 pt problem with no work is worth a maximum of 2.5 pts.

What is the solubility (in mg/L) of PbSO4 (303.3 g/mol) in a…

What is the solubility (in mg/L) of PbSO4 (303.3 g/mol) in a solution that is already 3.4 M SO42-? Ksp = 6.3 x 10-7. Note: Assume that the change in is negligible. If no work is submitted for this problem, there will be a penalty of 50%. This means a correct answer for a 5 pt problem with no work is worth a maximum of 2.5 pts.