Question

Acid dissociation constant, Ka. An acid mine drainage treatment system in Pittsburgh, Pennsylvania, is

being rehabilitated due to low treatment efficiency. Engineers want to know the concentration of metals in the sediment of the final settling basin. A 2 mg/L nitric acid (HNO3) is used in a microwave digestor to

solubilize the metals from the sediment before analysis. Assuming that the nitric acid reaction below is at

equilibrium (pKa = -1.4), determine the pH of the solution. (Answer: pH=1.55)

???3 ↔ ?^ (+) + ??3^ (-)

Answer 1

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